The 42nd Condensed Matter and Materials Meeting Wagga Wagga, NSW 30th January – 2nd February 2018 Conference Handbook Australian and New Zealand Institutes of Physics 42nd Annual Condensed Matter and Materials Meeting Charles Sturt University, Wagga Wagga, NSW 30th January – 2nd February, 2018 CONFERENCE HANDBOOK 2018 Organising Committee Chair: Jennifer MacLeod Program Committee Chair: John Bell Treasurer: Josh Lipton-Duffin Committee members: Nunzio Motta Soniya Yambem, Maksym Rybachuk (Griffith Uni) School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) 1 CONTENTS Sponsors 3 Maps 4-5 The CMM Group 6 Photos from Wagga 2017 7 Attendee Information 8 Exhibitors 9 Participants 10-11 Timetable 12 Oral Presentation Schedule 13 - 19 Wednesday Poster Session Listing 20 - 22 Thursday Poster Session Listing 23 - 24 Abstracts for Oral Presentations 25 - 67 Abstracts for Poster Presentations 68 - 94 Front Cover Image: This scanning electron microscope (SEM) image shows a thin film of titanium on Si(100) at ~35000X magnification. This sample was prepared and imaged as part of PVB304, the undergraduate capstone physics unit offered at QUT. Courtesy: Dr Jennifer MacLeod (Queensland University of Technology) 2 WAGGA 2018 SPONSORS 3 MAPS Wagga Wagga and the location of the Charles Sturt University campus Location of Convention Centre and cottage accommodation Convention Centre and Dining Hall Cottages 4 Detailed map of accommodation Cottages Ensuite rooms 5 THE CMM GROUP Welcome to the “Wagga” community Just by attending the annual Condensed Matter and Materials (CMM) Meeting you are a member of the CMM topical group of the Australian Institute of Physics (AIP). However, when you are renewing your AIP membership (or joining for the first time), please indicate your association with the CMM topical group by ticking the appropriate box. There are no additional forms or membership fees involved. Take a look at the CMM Group web site It can be accessed from the AIP national web site (www.aip.org.au) by clicking the drop- down tag “BRANCHES AND GROUPS” at the top of page and then selecting “CONDENSED MATTER AND MATERIALS (CMM)”. Alternatively, you can go directly to http://cmm-group.com.au/ Take some time to glance through the images of participants and activities from previous meetings that can be found in the “Past Wagga Years, tributes” section of the site. Please share your favourite “Wagga” experiences If you have some special group images of you and colleagues, interesting events and stories from previous "Waggas", please share them with us by passing them on to Glen Stewart (g.stewart@adfa.edu.au) who will have them incorporated into the “Past Wagga Years, tributes” section of the CMM Group web site. Please include in your e-mail the year of the meeting and the names of those “Waggarites” you are able to identify in the images. 1978 2002 6 http://cmm-group.com.au/ file://qut.edu.au/Documents/StaffHome/StaffGroupM$/macleojm/Documents/Work/Organization/Wagga%202018/Abstracts/Program%20drafts/Fourth%20draft/g.stewart@adfa.edu.au PHOTOS FROM WAGGA 2017 7 ATTENDEE INFORMATION Scientific Program: All poster sessions and lectures will be held at the Convention Centre. Chairpersons and speakers are asked to adhere closely to the schedule for the oral program. A PC laptop computer and data projector, overhead projector, pointer and microphone will be available. Please check that your presentation is compatible with the facilities provided as early as possible. Posters should be mounted as early as possible. Please remove your Wednesday session posters by early Thursday morning and your Thursday session posters by the close of the program on Friday. Logistics: Please wear your name tag at all times. Registration and all other administrative matters should be addressed to the registration desk or a committee member. For lost keys or if locked out of your room from 09:00 to 17:00, contact the Events Office for assistance 6933 4974; after hours, contact the Accommodation and Security Office near the corner of Valder Way and Park Way or phone them at 6933 2288. Delegates must check out of their rooms on Friday morning before 10:00am. Meals, Refreshments and Recreational Facilities: CSU is currently renovating the Convention Centre, which may cause some changes to the locations for Meeting events. Please pay attention to posted signs and announcements from the Meeting organisers. All meals will be served in the “Food Bowl” dining room at Atkins Hall, except the Conference Dinner on Wednesday 31st January, which will be held in the Convention Centre. Your conference name tag will be required in order to obtain your meals from the Food Bowl. Morning and afternoon tea will be served each day, as indicated in the timetable. Coffee and tea-making facilities are also available in the Common Room of each residence. In addition, on arrival on Tuesday afternoon and for the poster sessions, drinks will be available from the Conference Bar. The swimming pool and the adjacent gymnasium and squash courts are available for the use of Meeting attendees. A wide range of facilities such as exercise bikes, table tennis and basketball are available in the gymnasium. Access to these facilities is covered by your registration fee. The pool opening hours are 11am to 9pm every week day and 11am to 6pm weekends. The gym is open 6am to 9pm every day. CSU Contact Numbers: Events Office Phone (02) 6933 4974 Campus Security 1800 931 633 Wireless Internet: Available onsite through eduroam. 8 EXHIBITORS http://vac.agency/ Address: c/o Australian Nuclear Technology Org. Lucas Heights, NSW 2234 Phone: 61439130430 Contact: Anton Stamfl Email: aps@ansto.gov.au www.scitek.com.au Address: 4/12 Chaplin Dr, Lane Cove NSW 2066 Phone:(02) 9420 0477 Contact: Tobias Schappeler Email: tobias@scitek.com.au www.ezzivacuum.com.au Address: 1 Dalmore Dr, Scoresby VIC 3179 Phone: 1800 463 994 Contact: Dr Adil Adamjee Email: adil@ezzivacuum.com.au 9 http://vac.agency/ http://www.scitek.com.au/ PARTICIPANTS Last Name First Name Organization Email ABYAZISANI Maryam Queensland University of Technology (QUT) m.abyazisani@qut.edu.au ADAMJEE Adil Ezzi Vision huzefa@ezzivacuum.com.au ANDERSSON Gunther Flinders University gunther.andersson@flinders.edu.au ASSADI Hussein University Of Tsukuba hussein@ccs.tsukuba.ac.jp AZEEM Muhammad University Of Sharjah mazeem@sharjah.ac.ae BAK Jino Chung-ang University Hospital, College of Medicine. jinorang@gmail.com BELL John Queensland University of Technology (QUT) j.bell@qut.edu.au BOOTH Norman Australian Nuclear Science and Technology Organisation normanb@ansto.gov.au BRADFORD Jonathan Queensland University of Technology (QUT) jw.bradford@qut.edu.au CADOGAN Sean UNSW Canberra s.cadogan@adfa.edu.au CAIRNEY Julie The University Of Sydney julie.cairney@sydney.edu.au CAMPBELL Stewart UNSW Canberra stewart.campbell@adfa.edu.au CASHION John Monash University john.cashion@monash.edu CHEA Katherine RMIT University chea.katherine.k@gmail.com COLLOCOTT Stephen CSIRO (retired) stephen.collocott@gmail.com COOK Brenton RMIT University brenton.cook@rmit.edu.au CULCER Dimitrie UNSW d.culcer@unsw.edu.au DENG Guochu Australian Nuclear Science And Technology Organisation guochu.deng@ansto.gov.au DI BERNARDO Iolanda Sapienza, Università Di Roma iolanda.dibernardo90@gmail.com ESCANO Mary Clare Sison University Of Fukui mcescano@u-fukui.ac.jp FERNANDO Joseph Queensland University of Technology (QUT) jf.fernando@qut.edu.au FINLAYSON Trevor University Of Melbourne trevorf@unimelb.edu.au FIRESTEIN Konstantin Queensland University of Technology (QUT) konstantin.faershteyn@qut.edu.au FOLEY Catherine CSIRO cathy.foley@csiro.au FOONGKAJOURNKIAT Satcha Queensland University of Technology (QUT) satcha.foongkajornkiat@ hdr.qut.edu.au GASTON Nicola The University of Auckland n.gaston@auckland.ac.nz GHIMIRE Madhav Prasad IFW Dresden m.p.ghimire@ifw-dresden.de GOLBERG Dmitri Queensland University of Technology (QUT) dmitry.golberg@qut.edu.au GUEHNE Robin The Macdiarmid Institute For Advanced Materials And Nanotechnology r.guehne@gmx.de HORN Michael Queensland University of Technology (QUT) michael.horn@hdr.qut.edu.au HUTCHISON Wayne University Of New South Wales w.hutchison@adfa.edu.au ILES Gail RMIT University gail.iles@rmit.edu.au JONES Antony UOW anj093@uowmail.edu.au KAREL Julie Monash University julie.karel@monash.edu 10 Last Name First Name Organization Email KIM Se-hun Jeju National University spinjj@jejunu.ac.kr KOU Liangzhi Queensland University of Technology (QUT) liangzhi.kou@qut.edu.au KUMAR Nitish UNSW nitish.kumar@unsw.edu.au LEE Kai-yang Karlsruhe Institute Of Technology kai-yang.lee@kit.edu LEE Wai Tung Australian Nuclear Science and Technology Organisation wtl@ansto.gov.au LIPTON-DUFFIN Josh Queensland University of Technology (QUT) josh.liptonduffin@qut.edu.au LORA SERRANO Raimundo University Of Uberlandia, Brazil r.loraserrano@adfa.edu.au MACLEOD Jennifer Queensland University of Technology (QUT) jennifer.macleod@qut.edu.au MAKMOR Nazrul UNSW Canberra n.makmor@student.unsw.edu.au MALLETT Ben University Of Auckland b.mallett@auckland.ac.nz MCINTYRE Garry Australian Nuclear Science And Technology Organisation garry.mcintyre@ansto.gov.au MOTTA Nunzio Queensland University of Technology (QUT) n.motta@qut.edu.au O'BRIEN Joel UNSW j.obrien@student.unsw.edu.au RACHEL Stephan University Of Melbourne stephan.rachel@unimelb.edu.au RAEBER Thomas RMIT University thomas.raeber@rmit.edu.au ROGGE Sven UNSW s.rogge@unsw.edu.au RULE Kirrily Australian Nuclear Science and Technology Organisation kirrilyr@gmail.com SAAD Hatem UNSW Canberra Hatem.Saad@student.adfa.edu.au SAKO Tokuei Nihon University sako.tokuei@nihon-u.ac.jp SCARIA MADATHIPARAMBIL Aldritt The Macdiarmid Institute For Advanced Materials And Nanotechnology aldritt.madathiparambil@vuw.ac.nz SCHAPPELER Tobias Scitek tobias@scitek.com.au SCHIFFRIN Agustin Monash University agustin.schiffrin@monash.edu SCHUYT Joseph SCPS jschuyt@gmail.com SELLAR Jeffrey Monash University jeff.sellar@monash.edu SEPTIANI Ardita UNSW Canberra a.septiani@student.adfa.edu.au SHI Xi UNSW xi.shi@student.unsw.edu.au STEWART Glen UNSW Canberra g.stewart@adfa.edu.au SUTTON Callum Australian Nuclear Science and Technology Organisation u6374247@anu.edu.au TORRES TORRES Carlos Instituto Politecnico Nacional crstorres@yahoo.com.mx TURANGAN Nikka Queensland University of Technology (QUT) n.turangan@hdr.qut.edu.au ULRICH Clemens UNSW c.ulrich@unsw.edu.au VANCE Eric Australian Nuclear Science and Technology Organisation erv@ansto.gov.au WASALATHILAKE Kimal Queensland University of Technology (QUT) kimal.wasalathilake@qut.edu.au WOLF Sebastian University Of Melbourne swolf1@student.unimelb.edu.au WOLFF Annalena Queensland University of Technology (QUT) annalena.wolff@qut.edu.au YAKYMOVYCH Andriy University of Vienna andriy.yakymovych@univie.ac.at YAMBEM Soniya Queensland University of Technology (QUT) soniya.yambem@qut.edu.au ZHANG Chunmei Queensland University of Technology (QUT) chunmei.zhang@hdr.qut.edu.au 11 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 07:30 07:30 07:30 Breakfast 08:45 08:45 TM1 08:45 FM1 09:00 WM1 09:15 TM2 09:15 FM2 Aldritt Madathiparambil Tokuei Sako 09:30 WM2 09:30 TM3 09:30 FM3 Clemens Ulrich Joseph Schuyt Robin Guehne 09:45 WM3 09:45 TM4 09:45 FM4 Carlos Torres-Torres Nitish Kumar Dimi Culcer 10:00 WM4 10:00 TM5 10:00 FM5 Mary Clare Sison Escaño 10:15 CONFERENCE PHOTO 10:30 10:30 10:30 11:00 WN1 11:00 TN1 11:00 FN1 11:30 WN2 11:30 TN2 11:30 FN2 Kirrily Rule Jonathan Bradford Antony Jones 11:45 WN3 11:45 TN3 11:45 FN3 Trevor Finlayson Gunther Andersson Ben Mallett 12:00 WN4 12:00 TN4 12:00 FN4 Wai Tung (Hal) Lee Stephan Rachel Sebastian Wolf 12:15 WN5 12:15 TN5 12:15 Julie Karel Josh Lipton-Duffin 12:30 12:30 12:30 14:00 WA1 14:00 TA1 14:30 WA2 14:30 TA2 Chunmei Zhang Iolanda Di Bernardo 14:45 WA3 14:45 TA3 Konstantin Firestein Andriy Yakymovych 15:00 WA4 15:00 TA4 Madhav Prasad Ghimire Joseph Fernando 15:15 WA5 15:15 TA5 Maryam Abyazisani Thomas Raeber 15:30 WA6 15:00 TA6 Brenton Cook Kimal Wasalathilake 15:45 WA8 15:45 TA7 Muhammed Azeem Xi Shi 16:00 16:00 16:00 18.00 18.00 18:30 19:30 19:30 21:00 22:00 22:00 Wine Tasting Tuesday 30-01-2018 Wednesday 31-01-2018 Thursday 01-02-2018 Friday 02-02-2018 Breakfast After-Dinner Talk Cathy Foley Conference Dinner Morning Tea Sven Rogge Breakfast Awards and Closing Julie Cairney Trivia Night Lindsay Davis Cup E M E R G IN G M A T E R IA L S 2 Lunch Afternoon Tea and Poster Session 2 (TP) Dmitri Golberg N A N O M A T . C H A R A C T E R IS A TI O N Agustin Schiffrin Morning Tea S U R F A C E S C IE N C E Annalena Wolff Morning Tea Q U A N T U M S Y S T E M S Cathy Foley S U P E R C O N D U C T IV IT Y Lunch Liangzhi Kou Conference Opening M A G N E T IC S Y S T E M S I Registration and Welcome Reception Dinner Dinner M A G N E T IC S Y S T E M S II Lunch Nicola Gaston Raimundo Lora-Serrano Gail Iles Afternoon Tea and Poster Session 1 (WP) E M E R G IN G M A T E R IA L S I 12 14:00 Registration MAGNETIC SYSTEMS I Session Chair: John Bell (Queensland University of Technology) WM1 Wednesday, January 31 INVITED 9:00 Research projects at RMIT in Physics, Space and Beyond! Gail N. Iles Physics, School of Science, RMIT University, Melbourne, VIC 3000, Australia WM2 Wednesday, January 31 9:30 Stability and Scaling Behavior of the Spin Cycloid in BiFeO3 Thin Films Clemens Ulrich School of Physics, The University of New South Wales, Sydney, Australia WM3 Wednesday, January 31 9:45 Optical Kerr Effect Exhibited by Platinum and Gold Nanoparticles Measured by Time- Resolved Self-Diffraction C. Torres-Torres Sección de Estudios de Posgrado e Investigación, Escuela Superior de Ingeniería Mecánica y Eléctrica Unidad Zacatenco, Instituto Politécnico Nacional, México, 07738, México WM4 Wednesday, January 31 10:00 Magnetic Behavior of As-antisite Defect in Low-temperature GaAs from First-principles Bandstructure with Spin-orbit Interaction M.C. S. Escaño Department of Applied Physics, University of Fukui, 3-9-1 Bunkyo, Fukui 910 8507, Japan Wednesday, January 31 10:15 CONFERENCE PHOTO MAGNETIC SYSTEMS II Session Chair: Garry McIntyre (ANSTO) WN1 Wednesday, January 31 INVITED 11:00 On the physical properties of the magnetically frustrated system BaTi1/2Mn1/2O3, a spin liquid candidate R. Lora-Serrano Univ. Fed. de Uberlândia, Instituto de Física, 38400-902, Uberlândia-MG, Brasil WN2 Wednesday, January 31 11:30 Chemical disorder in a frustrated J1/J2 quantum spin chain material K. C. Rule Australian Nuclear Science and Technology Organisation, Locked bag 2001, Kirrawee DC, NSW 2232 13 WN3 Wednesday, January 31 11:45 Solitons and Martensitic Phase Transformations T.R. Finlayson School of Physics, University of Melbourne, Vic 3010, Australia WN4 Wednesday, January 31 12:00 Polarised Neutrons for Material Science Research at ANSTO W.T. Lee Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales 2234, Australia WN5 Wednesday, January 31 12:15 Uncovering Berry: The Role of Topology in the Anomalous Hall Effect of Amorphous Ferromagnetic Fe-Si and Antiferromagnetic Mn3Ge J. Karel Department of Materials Science and Engineering, Monash University, Clayton, Victoria EMERGING MATERIALS I Session Chair: Iolanda Di Bernardo (University of Rome/ANU) WA1 Wednesday, January 31 INVITED 14:00 Designing Superatomic Assemblies Nicola Gaston The MacDiarmid Institute for Advanced Materials and Nanotechnology, Department of Physics, the University of Auckland, Private Bag 92019, Auckland 1010 New Zealand WA2 Wednesday, January 31 14:30 Computational Discovery and Design of Novel Dirac Materials Chunmei Zhang School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Gardens Point Campus, QLD 4001, Brisbane, Australia WA3 Wednesday, January 31 14:45 Al based composite materials reinforced with BN, AlN and AlB2 K.L. Firestein School of Chemistry, Physics and Mechanical Engineering, Queensland Universityof Technology (QUT), Brisbane, Queensland 4000, Australia WA4 Wednesday, January 31 15:00 Cleavage Energies of Layered Materials: Bi14Rh3I9, Bi2TeI, β-Bi4I4 and 2H-MX2 Madhav Prasad Ghimire IFW Dresden e. V., Helmholtzstraße 20, D-01069 Dresden, Germany CMPRC Butwal, Butwal-11, Rupandehi, Nepal 14 NANOMATERIALS CHARACTERIZATION Session Chair: Dmitri Golberg (Queensland University of Technology) TM1 Thursday, February 1 INVITED 8:45 Minerals at the atomic scale – new frontiers in atom probe tomography J. M. Cairney The Australian Centre for Microscopy and Microanalysis, The University of Sydney New South Wales 2006 Australia TM2 Thursday, February 1 9:15 Optically Stimulated Luminescence and 2-D Dosimetry using Fluoroperovskites A.S. Madathiparambil School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand TM3 Thursday, February 1 9:30 Fluoroperovskites as Radiation Dosimeter Materials J.J. Schuyt School of Physical and Chemical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand TM4 Thursday, February 1 9:45 Defect Mechanisms in BaTiO3-BiMO3 (M = metal) Ceramics Nitish Kumar Materials Science, Oregon State University, USA Materials Science and Engineering, The University of New South Wales, Sydney, Australia WA5 Wednesday, January 31 15:15 Growth of one-dimensional polymers through on-surface reactions M. Abyazisani School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia WA6 Wednesday, January 31 15:30 The limit of superelasticity of glassy carbon following compression B.A. Cook School of Science, RMIT University, Melbourne, VIC, Australia WA7 Wednesday, January 31 15:45 Direct energy gap in light rare earth nitrides: EuN and SmN Muhammad Azeem Department of Applied Physics and Astronomy, University of Sharjah, Sharjah 27272, United Arab Emirates 15 TM5 Thursday, February 1 INVITED 10:00 Ion Microscopy: From Ion Solid Interactions to Real World Applications Annalena Wolff Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia SURFACE SCIENCE Session Chair: Jennifer MacLeod (Queensland University of Technology) TN1 Thursday, February 1 INVITED 11:00 On-Surface Synthesis of Trinuclear Coordination Nanostructures A. Schiffrin School of Physics & Astronomy, Monash University, Clayton, Victoria 3800, Australia ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Monash University, Clayton, Victoria 3800, Australia TN2 Thursday, February 1 11:30 Lateral graphene/h-BN heterostructures from chemically converted epitaxial graphene on SiC (0001) J. Bradford School of Chemistry, Physics & Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia TN3 Thursday, February 1 11:45 Electronic Structure of Titania Surfaces Modified by Au Clusters G. G. Andersson Flinders Centre for NanoScale Science and Technology, Flinders University, Australia TN4 Thursday, February 1 12:00 Charge order in a frustrated two-dimensional atom lattice Stephan Rachel School of Physics, University of Melbourne, Parkville, Victoria, Australia TN5 Thursday, February 1 12:15 The role of halogens in on-surface Ullmann polymerization Josh Lipton-Duffin Institute for Future Environments and School of Chemistry, Physics & Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia 16 EMERGING MATERIALS II Session Chair: Julie Cairney (University of Sydney) TA1 Thursday, February 1 INVITED 14:00 Boron Nitride Nanotubes, Nanoparticles and Nanosheets D. Golberg School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia TA2 Thursday, February 1 14:30 NanoPorous Graphene: topology vs. doping effects I. Di Bernardo Physics Department, Spienza Università di Roma, Roma, Italy. School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia TA3 Thursday, February 1 14:45 Density and Molar Volume of AlCoCrCuFeNi high-entropy alloy family A. Yakymovych Department of Metal Physics, Ivan Franko National University of Lviv, Lviv 79005, Ukraine. Department of Inorganic Chemistry – Functional Materials, Faculty of Chemistry, University of Vienna, Vienna 1090, Austria. TA4 Thursday, February 1 15:00 Three Component Hybrid Nanostructures of Pt-Au-ZnO with Enhanced Photocatalytic Properties J.F.S. Fernando School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia TA5 Thursday, February 1 15:15 Switching, transport and junction characteristics of an all-carbon memristor T. J. Raeber School of Science, RMIT University, GPO Box 2476V, VIC 3001, Melbourne, Australia TA6 Thursday, February 1 15:30 Investigation of mechanical and electrical properties of 3D porous graphene hydrogels K.C. Wasalathilake School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia TA7 Thursday, February 1 15:45 Fatigue Mechanisms in Lead-free BNT-BT-KNN Piezoceramics Xi Shi School of Science, Materials Science and Engineering, UNSW, Sydney, NSW 2052, Australia 17 QUANTUM SYSTEMS Session Chair: Agustin Schiffrin (Monash University) FM1 Friday, February 2 INVITED 8:45 Electronic-mechanical coupling in 2D Dirac materials Liangzhi Kou School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia FM2 Friday, February 2 9:15 Angular electron correlation dynamics in two-dimensional quantum dots in strongly correlated and completely uncorrelated regimes Tokuei Sako Laboratory of Physics, College of Science and Technology, Nihon University, 7-24-1, Narashinodai, Funabashi, Chiba 274-8501, Japan. Graduate School of Quantum Science and Technology, Nihon University FM3 Friday, February 2 9:30 Extraordinary Magnetic Field Independent NMR Linewidths Observed in Bi2Te3 Topological Insulator Nanoparticles R.Guehne The MacDiarmid Institute for Advanced Materials and Nanotechnology, SCPS, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand. Robinson Research Institute, Victoria University of Wellington, PO Box 33436, Lower Hutt 5046, New Zealand. Felix Bloch Institute for Solid State Physics, University of Leipzig, Linnéstrasse 5, 04103 Leipzig, Germany FM4 Friday, February 2 9:45 Quantum kinetic theory of magneto-transport in topological materials Dimitrie Culcer School of Physics and Australian Research Council Centre of Excellence in Future Low-Energy Electronics Technologies, UNSW Node, The University of New South Wales, Sydney 2052, Australia FM5 Friday, February 2 INVITED 10:00 Engineered quantum matter S. Rogge Centre for Quantum Computation and Communication Technology, School of Physics, The University of New South Wales, Sydney, New South Wales 2052, Australia 18 SUPERCONDUCTIVITY Session Chair: Kirrily Rule (ANSTO) FN1 Friday, February 2 INVITED 11:00 One HTS Josephson Junction - An Array of Applications: Has anything come from HTS devices in the last 32 years? C.P. Foley CSIRO Manufacturing, P.O. Box 218 Lindfield, NSW 2070, Australia FN2 Friday, February 2 11:30 Manipulation of the critical current density in YBa2Cu3O7 thin films by artificial defects A. Jones Institute for Superconducting and Electronic Materials, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia. CSIRO Manufacturing, 36 Bradfield Rd, Lindfield, Australia FN3 Friday, February 2 11:45 Superconductor Sandwiches B.P.P. Mallett The Photon Factory, School of Chemistry and Department of Physics, The University of Auckland, Auckland, New Zealand. FN4 Friday, February 2 12:00 Unconventional superconductivity in 2D systems from repulsive electron-electron interactions Sebastian Wolf School of Physics, University of Melbourne, Parkville, VIC 3010, Australia 19 WEDNESDAY POSTER SESSION Sponsored by WP01 Wednesday, January 31 16:00 – 18:00 Mössbauer and Magnetic Properties of Non-Stoichiometric Strontium M-type Hexaferrites Prepared by the Solid State Reaction Method A. Septiani School of Physical, Environmental and Mathematical Sciences, University of New South Wales, Canberra, 2600, Australia WP02 Wednesday, January 31 16:00 – 18:00 In situ monochromator alignment on ANSTO’s thermal spectrometer, TAIPAN C. Sutton Australian National University, Canberra, Australia Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234 Australia WP03 Wednesday, January 31 16:00 – 18:00 The magnetic structures of RTi2Ga4 (R= Er, Ho and Dy) Hatem Saad School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Canberra, ACT 2600 WP04 Wednesday, January 31 16:00 – 18:00 Investigation of the Magnetic and Crystal Field Excitations in the Orthorhombically Distorted Perovskites TbVO3 and CeVO3 J. O’Brien School of Physics, University of New South Wales, Sydney NSW 2052, Australia WP05 Wednesday, January 31 16:00 – 18:00 Recent upgrades to ANSTO’s thermal neutron spectrometer, TAIPAN K.C. Rule Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234 Australia WP06 Wednesday, January 31 16:00 – 18:00 Hot Isostatic Pressing of Ceramics, Glass and Glass-Ceramics for Immobilisation of Intermediate- and High-Level Nuclear Waste E. R. Vance ANSTOsynroc, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia 20 WP07 Wednesday, January 31 16:00 – 18:00 Structural, Magnetic Phase Transitions and Magnetocaloric Effect in Sm1-xRxMn2Ge2 N. F. Makmor School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Canberra, ACT 2600 WP08 Wednesday, January 31 16:00 – 18:00 Size-driven ferroelectrics in 2D pseudo-spin model Se-Hun Kim Faculty of Science Education and Educational Science Research Institute, Jeju National University, Jeju 63243, Korea WP09 Wednesday, January 31 16:00 – 18:00 Magnetocaloric Mn(Co1-xNix)Ge - Structural and magnetic transitions Stewart J. Campbell School of Physical, Environmental and Mathematical Sciences, UNSW Canberra at the Australian Defence Force Academy, ACT 2610 WP10 Wednesday, January 31 16:00 – 18:00 Determination of the Crystal Field Levels in TmV2Al20 W.D. Hutchison School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Canberra, ACT, 2600, Australia WP11 Wednesday, January 31 16:00 – 18:00 Investigation on the Nature of the Verwey Transition in Cu-doped Fe3O4 Y. Kareri School of Physics, University of New South Wales, 2052 NSW, Australia. WP12 Wednesday, January 31 16:00 – 18:00 Spin dynamics of quasi-one-dimensional spin-ladder system SrCa13Cu24O41 in the long- range magnetic ordering state Guochu Deng Australian Nuclear Science and Technology Organisation, New Illawarra Road, Lucas Heights NSW 2234, Australia WP13 Wednesday, January 31 16:00 – 18:00 Magnetic Interplay of Mn and Yb Sites in YbMn2Si2 – Crystal Field and Electronic Structure Studies Stewart J. Campbell School of Physical, Environmental and Mathematical Sciences, UNSW Canberra at the Australian Defence Force Academy, Canberra, ACT 2610 21 WP14 Wednesday, January 31 16:00 – 18:00 The Cold-Neutron Triple-Axis Spectrometer SIKA at OPAL Guochu Deng Australian Nuclear Science and Technology Organisation, New Illawarra Road, Lucas Heights NSW 2234, Australia WP15 Wednesday, January 31 16:00 – 18:00 New Sample Environment Projects and Developments at the Australian Centre for Neutron Scattering N. Booth Australian Nuclear Science and Technology Organisation, New Illawarra Road, Lucas Heights NSW 2234, Australia 22 THURSDAY POSTER SESSION Sponsored by TP01 Thursday, February 2 16:00 – 18:00 Structure changes in SAC 305 solder joints with nanosized Ni and Ni-Sn additions during the thermal treatment A. Yakymovych Department of Metal Physics, Ivan Franko National University of Lviv, Lviv 79005, Ukraine. Department of Inorganic Chemistry – Functional Materials, Faculty of Chemistry, University of Vienna, Vienna 1090, Austria TP02 Thursday, February 2 16:00 – 18:00 Reassessment of the Oxidation State of Iron in MORB Glasses (Based on an Alternative Interpretation of Reference Mössbauer Spectra) G.A. Stewart School of PEMS, UNSW, ADFA, Canberra, Australia TP03 Thursday, February 2 16:00 – 18:00 Effect of Na excess and cation disorder on voltage and capacity of NaxRuO3 as Na ion battery cathode M.H.N. Assadi Center for Computational Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305- 8577, Japan TP04 Thursday, February 2 16:00 – 18:00 Unravelling the Iron Coordination in the Mössbauer Spectra of SFCA J.D. Cashion School of, Physics and Astronomy, Monash University, Melbourne, Vic. 3800 Australia TP05 Thursday, February 2 16:00 – 18:00 Strain mechanisms in lead-free piezoelectric BNT-BT under the influence of an applied electric field Kai-Yang Lee Institute for Applied Materials, Karlsruhe Institute of Technology, Karlsruhe, Germany 23 TP06 Thursday, February 2 16:00 – 18:00 Structure and dynamics in photovoltaic metal hydrides K. Chea College of Science, Engineering & Health, RMIT University, Melbourne, Australia. TP07 Thursday, February 2 16:00 – 18:00 Investigating and tuning the pore structure of graphitic supercapacitor electrodes. Michael Horn School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia TP08 Thursday, February 2 16:00 – 18:00 Quasi Free-Standing Graphene Growth on FIB-Patterned 3C-SiC Nanostructures Mojtaba Amjadipour School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, QLD, Australia TP09 Thursday, February 2 16:00 – 18:00 Synthesis and Characterization of Covalent Organic Frameworks as Thin Films N. Turangan School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia TP10 Thursday, February 2 16:00 – 18:00 209Bi NMR Study of Topological Insulator Bi2Se3 Single Crystals R. Guehne The MacDiarmid Institute for Advanced Materials and Nanotechnology, SCPS, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand. Robinson Research Institute, Victoria University of Wellington, PO Box 33436, Lower Hutt 5046, New Zealand. Felix Bloch Institute for Solid State Physics, Leipzig University, Linnéstrasse 5, 04103 Leipzig, Germany. 1 TP11 Thursday, February 2 16:00 – 18:00 Mechanical Characterisation of Soft Tissue: Investigation of Tear Resistance of Multi-fibrous Soft Tissue Satcha Foongkajornkiat School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, AustraliaP01 Thursday, Feb 24 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 ABSTRACTS OF ORAL PRESENTATIONS 25 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 MORNING SESSION (WM) Research projects at RMIT in Physics, Space and Beyond! Gail N. Ilesa a Physics, School of Science, RMIT University, Melbourne, VIC 3000, Australia The physics department at RMIT is home to five ARC centres of excellence in the fields of biophotonics, quantum computing, electronics, exciton science and artificial intelligence. The RMIT Microscopy and Microanalysis facility is a linked lab of the Australian Microscopy, and Microanalysis Facility. The School of Engineering hosts the MicroNano Research Facility and the Advanced Manufacturing Precinct with over 20 3D printers capable of both plastic and metal printing. Emerging, cross-disciplinary research projects are as follows; a) construction of a nanoparticle device to investigate magnetic nanoparticle formation in simulated microgravity, b) manufacture of 3D magnetic devices for racetrack memory, c) investigation and manufacture of thin, lightweight materials for the protection of humans from radiation in lunar orbit and d) design, construction and launch of a microgravity experiment into space to investigate scientific phenomena and implement complex systems engineering principles. Connections formed through teaching undergraduate physics and aerospace engineering students will lead to the formation of a research group skilled in implementing space projects and this will form the basis of the new ‘Physics with Space Science’ degree to be offered within the next three years at RMIT. The state-of-the-art infrastructure at RMIT in engineering and physics will allow these projects to be realised and will engage students and staff across a number of disciplines. 26 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 MORNING SESSION (WM) Stability and Scaling Behavior of the Spin Cycloid in BiFeO3 Thin Films S. R. Burns1, D. Sando1, J. Bertinshaw2, L. Russell2, X. Xu3,4, R. Maran1, S. J. Callori2,5, V. Ramesh1, J. Cheung1, S. A. Danilkin5, G. Deng5, W. T. Lee5, S. Hu1, L. Bellaiche3,4, Jan Seidel1, Nagarajan Valanoor1 & Clemens Ulrich2 1School of Materials Science and Engineering, The University of New South Wales, Sydney 2School of Physics, The University of New South Wales, Sydney, Australia 3Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA 4Institute for Nanoscience and Engineering, University of Arkansas, Arkansas 72701, USA 5Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales 2234, Australia Multiferroic materials demonstrate excellent potential for next-generation multifunctional devices, as they exhibit coexisting ferroelectric and magnetic orders. Bismuth ferrite (BiFeO3) is a rare exemption where both order parameters exist far beyond room temperature, making it the ideal candidate for technological applications. To realize magnonic devices, a robust long- range spin cycloid with well-known direction is desired, since it is a prerequisite for the magnetoelectric coupling. Despite extensive investigation, the stabilization of a large-scale uniform spin cycloid in nanoscale (<300 nm) thin BiFeO3 films has not been accomplished. Using neutron diffraction we were able to demonstrate cycloidal spin order in 100 nm BiFeO3 thin films which became stable through the careful choice of crystallographic orientation and control of the electrostatic and strain boundary conditions during growth [1]. Furthermore, Co-doping, which has demonstrated to further stabilize the spin cycloid, did allow us to obtain spin cycloid order in films of just 50 nm thickness, i.e. films thinner than the cycloidal length of about 64 nm. Interestingly, in thin films the propagation direction of the spin cycloid has changed and shows a peculiar scaling behavior for thinnest films. We were able to support these observations by Monte Carlo theory based on a first-principles effective Hamiltonian method. Our results therefore offer new avenues for fundamental research and technical applications that exploit the spin cycloid in spintronic or magnonic devices. [1] J. Bertinshaw, et al., Nature Com. 7, 12664 (2016). 27 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 MORNING SESSION (WM) Optical Kerr Effect Exhibited by Platinum and Gold Nanoparticles Measured by Time-Resolved Self-Diffraction C. Torres-Torresa, J. Bornacellib, R. Rangel-Rojoc and A. Oliverb a Sección de Estudios de Posgrado e Investigación, Escuela Superior de Ingeniería Mecánica y Eléctrica Unidad Zacatenco, Instituto Politécnico Nacional, México, 07738, México. b Instituto de Física, Universidad Nacional Autónoma de México, Ciudad de México, 04510, México. c Depto. de Óptica, Centro de Investigación Científica y de Educación Superior de Ensenada A.P. 360, Ensenada, B.C., 22860, México. The impact of plasmonic phenomena in quantum and all-optical applications has been importantly empowered by nonlinear optical properties at the nanoscale. Ultrafast nonlinear optical parameters exhibited by metallic nanoparticles are able to modulate phase and irradiance conditions related to nanophotonic signals [1]; besides, single-photon devices based on sharp selective energy transfer processes can be derived from Surface Plasmon Resonance interactions in low-dimensional systems [2]. The main result presented in this work concerns to the temporal dynamics exhibited by polarization-selectable third-order nonlinear optical effects in gold and platinum nanoparticles. The first-order of diffraction generated by a degenerated two-wave mixing was numerically and experimentally analyzed to identify the physical mechanism responsible for an induced birefringence in the samples. Comparative nanocomposites were separately nucleated by using gold and platinum ion-implantation in silica plates. The advantages of different resonant behavior of the nanostructures, together to the possibility for controlling multi-photonic signals by pico- and femto-second pulses were highlighted. The authors kindly acknowledge the financial support from IPN, CICESE, DGAPA-UNAM IN108217 and CONACyT through grants 222485 and CB-2015-251201. [1] C. Torres-Torres, L. Tamayo-Rivera, R. Rangel-Rojo, R. Torres-Martínez, H. G. Silva- Pereyra, J. A. Reyes-Esqueda, L. Rodríguez-Fernández, A. Crespo-Sosa, J. C. Cheang- Wong and A. Oliver, Nanotechnology 22(35), 355710 (2011). [2] J. Bornacelli, C. Torres-Torres, H. G. Silva-Pereyra, L. Rodríguez-Fernández, M. Avalos-Borja, J. C. Cheang-Wong and A. Oliver, Methods Appl. Fluoresc., 5, 025001 (2017). 28 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 MORNING SESSION (WM) Magnetic Behavior of As-antisite Defect in Low-temperature GaAs from First-principles Bandstructure with Spin-orbit Interaction M.C. S. Escañoa, Y. Osanaib and M. Tanib a Department of Applied Physics, University of Fukui, 3-9-1 Bunkyo, Fukui 910 8507, Japan. b Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan. Study of defect’s nature in wide-gap semiconductor such as GaAs can give light into its use as THz detector/emitter. In low-temperature GaAs (LT-GaAs), a two-step photon absorption via mid-gap states is proposed to explain the LT-GaAs-based photoconductive antenna’s detection of THz radiation when probed with 1.55μm probe laser [1]. So far, within first- principles, the defect’s magnetic and electronic properties using realistic defect concentration (1.0-1.3%) and within the broken-inversion symmetry of GaAs is still lacking. Here, density functional theory (DFT) calculations on a 216-atom GaAs bulk using hybrid exchange correlation functionals are conducted. The symmetry is accounted for by including spin-orbit (SO) interaction via projector augmented wave method [2]. We found that at the level of DFT+SO, a 1.46eV band-gap and 0.337eV split-off band at Γ are obtained in agreement with resonant Raman scattering (1.43eV, 0.341eV) [3]. Among the defects tested: As-antisite (AsGa), Ga-antisite (GaAs) and Ga-vacancy (Gavac), only the AsGa leads to a mid-gap state. Spin-resolved bandstructure of the GaAs with AsGa, reveals a paramagnetic nature of the defect, in agreement with electron spin resonance studies. The non-split behavior of the mid- gap state is due to induced tetrahedral symmetry when a Ga atom is replaced by As. Also, the state arises from localized charge density within the As tetrahedra and not solely on AsGa, as commonly thought. [1] M. Tani, K.S. Lee and X. C. Zhang, Appl. Phys. Lett., 77, 1396 (2000). [2] M.C Escaño, H. Kasai, M. Tani, J. Vac. Soc. Jpn. (in press). [3] P. Kusch, S. Breuer, M. Ramsteiner, L. Geelhaar, H. Reichert, and S. Reich, Phys. Rev. B. 86, 075317 (2012). 29 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 NOON SESSION (WN) On the physical properties of the magnetically frustrated system BaTi1/2Mn1/2O3, a spin liquid candidate. F. A. Garciaa, R. Lora-Serranob, M.R. Cantarinoa, R. P. Amaralb, E. C. Andradec, S. Brauningerd, R. Sarkard, H. Luetkense, C. Bainese. a IFUSP, Univ. de São Paulo, 05508-090, São Paulo-SP, Brasil. b Univ. Fed. de Uberlândia, Instituto de Física, 38400-902, Uberlândia-MG, Brasil. cInstituto de Física de São Carlos, Universidade de São Paulo, C.P. 369, São Carlos, SP, 13560-970, Brasil. dInstitute for Solid State Physics, TU Dresden, 01069 Dresden, Germany. eLaboratory for Muon Spin Spectroscopy, PSI, CH-5232 Villigen PSI, Switzerland. Important examples of materials hosting a ground state determined by dimensionality are the spin dimers forming valence bound solid (VBS). For some materials, site occupancy disorder and/or defects will lead to the appearance of orphan spins. The latter can be diluted in the lattice, and usually interact by means of an effective exchange much lower than the first neighbors’ interaction. At sufficient low temperatures (T), this interaction, however small, may lead to the formation of a spin liquid (SL) state, which will present many unusual magnetic properties [1]. In this ongoing research, we explore the magnetism of the disordered double perovskite BaTi1/2Mn1/2O3 (BMTO), which we have presented as a magnetically frustrated system where magnetic Mn4+ dimers, trimers and orphan spins coexist and create different energy scales of correlations [2]. This scenario is supported by macro- and microscopic structural and magnetic data in a large T interval (0.5 K ≤ T ≤ 1000 K). No long- range order is observed down to 0.2 K, though θCW<0 suggest antiferromagnetic correlations. Recent low T heat capacity, magnetization under applied magnetic fields (T = 0.2 K, H =9 T), and µSR data strongly suggest evidence that BMTO is a suitable candidate to host a SL ground state [3]. I will present the BMTO system, our main results and discuss some aspects of the challenging Physics involved. [1] L. Balents, Nature 464, 199 (2010). [2] F. A. Garcia et al., Phys. Rev. B 91, 224416 (2015). [3] M.R. Cantarino et al. In preparation. 30 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 NOON SESSION (WN) Chemical disorder in a frustrated J1/J2 quantum spin chain material K. C. Rule,a,b R. A. Mole,a J. Zanardo,b A. Krause-Heuer,a T. Darwish,a M. Lerchb a Australian Nuclear Science and Technology Organisation, Locked bag 2001, Kirrawee DC, NSW 2232 b School Of Physics, Northfields Ave, University of Wollongong, NSW, 2522 Recently a new one-dimensional (1D) quantum spin chain system has been synthesised: catena-dichloro(2-Cl-3Mpy)copper(II), [where 2-Cl-3Mpy=2-chloro-3-methylpyridine]. We shall refer to this compound as cd-Cu. Preliminary calculations and bulk magnetic property measurements indicate that this system does not undergo magnetic ordering down to 1.8K and is a prime candidate for investigating frustration in a J1/J2 system (where the nearest neighbour interactions, J1, are ferromagnetic and the next nearest neighbour interactions, J2, are antiferromagnetic) [1]. Calculations predicted 3 possible magnetic interaction strengths for J1 below 6meV depending on the orientation of the ligand [2]. For one of the predicted J1values, the existence of a quantum critical point is implied. A deuterated sample of cd-Cu was produced at the National Deuteration Facility and the excitations measured using the PELICAN TOF spectrometer. Scattering was weak from this sample, but indicated the most likely scenario involves an average of the 3 possible magnetic excitations in this material, rather than the random array of exchange interactions as predicted by Herringer et al., [2]. This may indicate the possibility of tuning the chemical structure to favour a system which may exhibit a quantum critical point. [1] T. Hamada et al., J. Phys Soc. Jpn, 57 1891-1894 (1988); T. Hamada et al., 58 3869 (1989); [2] S.N. Herringer et al., Chem Eur J. 20, 8355-8362 (2014) 31 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 NOON SESSION (WN) Solitons and Martensitic Phase Transformations T.R. Finlaysona and A. Saxenab a School of Physics, University of Melbourne, Vic 3010, Australia. b Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A. A model for the dynamical behaviour of coherent interfaces and modulated structures based on topological solitons was introduced by Barsch and Krumhansl (B&K) and applied to the twins accompanying martensitic transformations [1]. For wave propagation in the principal symmetry directions in a cubic crystal, B&K obtained the phonon dispersion relations ρ0 2(𝐤) = c(�̂�)𝐤2 + d(�̂�)𝐤4 (1) where c(�̂�) are the second-order elastic constants associated with mode  and propagation direction, �̂� = 𝐤 k⁄ . The d(�̂�) are linear combinations of strain gradient coefficients. B&K further showed [1] that for a wave vector along a high symmetry direction, it was more instructive to consider the truncated series  0  2(𝐤) = A(�̂�)[sin( 2⁄ )]2 + B(�̂�)[sin( 2⁄ )]4 (2) Here  is the wave vector in reciprocal lattice units, A(�̂�) is proportional to d(�̂�) and B(�̂�) is a linear combination of c(�̂�) and d(�̂�). Phonon dispersion data available at the time [2], were used to illustrate the soliton model. Based on Equation (2), an analysis of the phonon frequencies, , for the [0][̅0] branch, via [ sin( 2⁄ )⁄ ]2 versus [sin( 2⁄ )]2, resulted in two, straight-line sections, the slopes of which are related to the strain-gradient coefficient and the intercept corresponded to the ultrasonic velocity for a crystal of similar composition [3]. Similar analyses more recently using [0][̅0] data sets from several In-Tl crystals of different compositions, show very similar behaviour. A discussion of the B&K soliton model will be presented and an interpretation of the results found for In-Tl crystals will be suggested. [1] G.R. Barsch and J.A. Krumhansl, Proc. Int. Conf. on Martensitic Transformations (1992), eds. C.M. Wayman and J. Perkins (Monterey Inst. of Adv. Studies, 1993) p 53. [2] T.R. Finlayson, M. Mostoller, W. Reichardt and H.G. Smith, Solid State Commun. 53, 461 (1985). [3] D.J. Gunton and G.A. Saunders, Solid State Commun. 14, 865 (1974). 32 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 NOON SESSION (WN) Polarised Neutrons for Material Science Research at ANSTO W.T. Leea and T. D’Adama a Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales 2234, Australia. Polarised neutron scattering can definitively identify magnetic structures and dynamics, and separate the structural signal and the spin-incoherent scattering in hydrogen-rich materials. At ANSTO, our project to incorporate this capability to a wide suit of instruments is coming to fruition. User research experiments using polarised neutrons have recently been carried out to study multiferroic and magnetostrictive materials on the TAIPAN thermal triple-axis spectrometer and WOMBAT high-intensity diffractometer, and from an earlier time, magnetic multilayers on the PLATYPUS reflectometer. One of the first round of user research has been published. We have now also completed the deployment and test on the PELICAN cold neutron chopper spectrometer, QUOKKA SANS instrument and SIKA cold triple-axis spectrometer. Condensed matter research experiments will be carried out on those three instruments in the first half of 2018. The ECHIDNA high-resolution diffractometer is the next instrument to acquire this capability. Our development focus is now on providing user support to plan experiment, reduce data and analyse data: Rather than a surveying technique, a polarised neutron experiment is often done in the regions of interest identified using unpolarised neutron measurements. The type of polarizer and analyser (often polarised Helium-3 based) would affect what and how the measurements will be done. And polarised neutron data reduction and analysis would add a level of complexity to the process. This presentation will provide an overview of the capabilities available, some of the experiments that had been carried out to illustrate how material research can utilize polarised neutrons and the key factors to consider in planning an experiment and reducing the data. 33 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 NOON SESSION (WN) Uncovering Berry: The Role of Topology in the Anomalous Hall Effect of Amorphous Ferromagnetic Fe-Si and Antiferromagnetic Mn3Ge J. Karela, A.K. Nayakb, J. E. Fischerb, B. Yanb, J. Küblerb, S.D. Boumac, C. Bordelc, C. Felserb and F. Hellmanc a Department of Materials Science and Engineering, Monash University, Clayton, Victoria b Max Planck Institute for Chemical Physics of Solids, Dresden, Germany c Physics Department, University of California Berkeley, Berkeley, California The consideration of topology has recently led to the emergence of new exotic physics. Since its discovery, the Berry phase has helped explain diverse phenomena in condensed matter physics, with perhaps one of the most important breakthroughs being the reinterpretation of the intrinsic contribution to the anomalous Hall effect (AHE) in ferromagnets in terms of a Berry phase curvature in momentum space. Recent theoretical predictions have further suggested that the Berry phase can also give rise to an AHE in antiferromagnets with non- collinear spin structures. [1] This talk will examine the role of the Berry phase on the AHE in both amorphous ferromagnets and noncolinear antiferromagnets. It will be shown that the anomalous Hall conductivity (σxy), when suitably normalized by magnetization and number of charge carriers, is independent of the longitudinal conductivity in a series of amorphous Fe-Si thin films. This observation suggests a primary dependence on an intrinsic mechanism, which is remarkable because it indicates a local atomic level description of a Berry phase, resulting in an intrinsic AHE in a system that lacks lattice periodicity. [2] The second part of the talk will discuss the emergence of the AHE in the noncolinear antiferromagnet, Mn3Ge. The AHE in ferromagnets generally scales with the magnetization, meaning that an antiferromagnet with no net magnetization should not exhibit an AHE. It will be shown that not only does Mn3Ge exhibit an AHE but one that is comparable to that of ferromagnetic metals. Theoretical calculations will demonstrate that this effect originates from a non-vanishing Berry curvature, arising from the chiral spin structure. [3] [1] Chen et al., Phys. Rev. Lett. 112, 017205 (2014). [2] Karel et al., Europhys. Lett. 114, 57004 (2016). [3] Nayak et al., Science Advances 2, e1501870 (2016). 34 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 AFTERNOON SESSION (WA) Designing Superatomic Assemblies Nicola Gaston The MacDiarmid Institute for Advanced Materials and Nanotechnology, Department of Physics, the University of Auckland, Private Bag 92019, Auckland 1010 New Zealand Inspired by recent progress in the synthesis of cluster assembled solids, and the theoretical description of globally delocalized electronic structure of nanoscale building blocks – superatoms – we address the question to what extent the three new materials [Co6Se8(PEt3)6][C60]2, [Cr6Te8(PEt3)6][C60]2, and [Ni9Te6(PEt3)8]C60, upon forming bulk compounds, imitate atomic analogues. The concept of superatoms for describing atom-imitating clusters is very intriguing since it allows chemists to apply chemical intuition – a useful tool for predicting new materials – when it comes to inter-cluster reactions. Thus, we systematically study the lattice structure, the intercluster binding, and the electronic structure by density functional theory and assess their superatomic features. We show that collective properties emerge upon bulk formation, which promotes arguments for the formation of solids in which the constituent clusters have a superatomic character, allowing for solid-state concepts to become relevant. Finally, we present principles for the design of novel assemblies created from tunable superatoms [1] and methods for the prediction of their electronic properties [2]. We also propose an extension of the superatomic concept to include tunable transition metal clusters, which have long been neglected but which allow for the incorporation of tunable magnetic states [3]. [1] J. Schacht & N. Gaston. Chem. Phys. Chem. 17, 3237 (2016). [2] L. Hammerschmidt, J. Schacht, & N. Gaston. Phys. Chem. Chem. Phys. 18, 32541 (2016). [3] J. T. A. Gilmour, L. Hammerschmidt, J. Schacht, & N. Gaston. J. Chem Phys. 147 (15), 154307 (2017). 35 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 AFTERNOON SESSION (WA) Two-dimensional C3B/C3N Van der Waals Heterostructure: Built-in Electric Field, Band Opening/Inversion and Enhanced Photocurrent Production by Strong Electron Coupling Chunmei Zhang1, Yalong Jiao1, Tianwei He1, Steven Bottle1, Thomas Frauenheim2 and Aijun Du1,* 1School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Gardens Point Campus, QLD 4001, Brisbane, Australia 2Bremen Center for Computational Materials Science, University of Bremen, Am Falturm 1, 28359 Bremen, Germany Two-dimensional (2D) van der Waals (vdW) heterostructures (HTS) allow the combination of properties from a variety of 2D materials and represent the fundamental platform for important solid-state device fabrication. However, the interlayer electron coupling is often governed by relatively weak long-range vdW interactions, thereby limiting practical applications. Herein, based on density functional theory, we demonstrate that an effective electron coupling can be created in 2D C3B/C3N vdW HTS. Monolayer C3B and C3N, which have been fabricated in recent experiments, are p- and n-typed doped large gap semiconductors, respectively. However, the formed vdW HTS exhibits novel Dirac fermion as presented in this work. Additionally, a large interlayer built-in electric field is generated in this HTS, leading to an intrinsic band inversion between pz orbital of B and N atoms. A simple tight-binding model with the nonzero interlayer hopping parameters is constructed and can well reproduce the electronic band structure. Compared to isolated C3B and C3N, the 2D C3B/C3N vdW HTS is very optically active with enhanced photocurrent production and displays broadened absorbance spectrum from the near infrared to the ultraviolet region. Our results demonstrate the importance of electron coupling in the modulation of materials properties of 2D vdW HTS and suggest a practical strategy to realize a strong electron coupling toward the realistic applications in nanoelectronics and photonics. 36 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 AFTERNOON SESSION (WA) Al based composite materials reinforced with BN, AlN and AlB2 K.L. Firesteina, A. E. Steinmanb, S. Corthayb, A.M. Kovalskiib, A.T. Matveevb, D.V. Shtanskyb, D. Golberga a School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia. b University of Science and Technology “MISIS”, Leninsky prospect 4, Moscow, 119049, Russian Federation For many years metal matrix composites (MMC) continue to attract interest in both scientific and industrial fields. The combined effect of a ductile metallic matrix and a strong reinforcing phase allows for achievement of properties unreachable for traditional alloys. In our previous works [1, 2] we showed that utilization of BN nano- and microparticles as reinforcing phase in Al-based composite materials resulted in significant increase of material strength. In work [2] powder mixtures were obtained using ball milling technique, which led to formation of additional phases on the Al – BN interphase: AlB2 and AlN. The aim of the present work is to investigate the specific influence of AlN, AlB2 and BN nanophases and their combination on the mechanical properties of the final Al-MMCs. The composites were fabricated by combination of high-energy ball milling and spark plasma sintering techniques. To form desired reinforcing phases in-situ during ball milling, powders of Al, BN, B and Li3N were used as source materials. The structures of powder mixtures and composite materials were studied by scanning and transmission electron microscopy. The influence of reinforcing phase content (1, 3, 5, and 7 wt%) on the tensile strength was investigated. In addition, the tensile tests at 500 °C were performed. X-ray and EDX analysis demonstrated that B and Li3N particles react with Al with formation of AlB2 and AlN during high-energy ball milling and sintering processes. [1] K.L. Firestein, A.E., Steinman, I.S. Golovin, J. Cifre, E.A. Obraztsova, A.T. Matveev, A.M. Kovalskii, O.I. Lebedev, D.V. Shtansky, D. Golberg, Materials Science and Engineering: A, 642, 104-112, (2015). [2] K.L. Firestein, S. Corthay, A.E., Steinman, A.T. Matveev, A.M. Kovalskii, I.V. Sukhorukova, D. Golberg, D.V. Shtansky, Materials Science and Engineering: A, 681, 1- 9 (2017). 37 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 AFTERNOON SESSION (WA) Cleavage Energies of Layered Materials: Bi14Rh3I9, Bi2TeI, β-Bi4I4 and 2H- MX2 Madhav Prasad Ghimirea,b*, Jeroen van den Brinka and Manuel Richtera,c a IFW Dresden e. V., Helmholtzstraße 20, D-01069 Dresden, Germany. b CMPRC Butwal, Butwal-11, Rupandehi, Nepal. c DCMS, TU Dresden, D-01069 Dresden, Germany. * Corresponding author: m.p.ghimire@ifw-dresden.de In recent years weakly bonded layered systems have become important for the manufacturing of two-dimensional materials. Precise knowledge of the interlayer bonding allows to understand in detail the exfoliation process in these compounds. Cleavage energies are crucial in this respect. Here we report the cleavage energies and electronic properties of the weak topological insulators (TIs) Bi14Rh3I9, Bi2TeI and β-Bi4I4, as well as of 2H-transition metal dichalcogenides (MX2 where M=Mo, W and X=S, Se, Te) determined by means of density functional theory calculations. Our calculations reproduce the experimentally measured value of cleavage energy of graphite, Ec (graphite) = 0.37 Jm−2 [1], which we use as a benchmark. Based on this, we calculate the cleavage energies of the three weak TIs and 2H-MX2 systems. We find that all energies are smaller than 2×Ec of graphite. The obtained values suggest the possibility of exfoliation of individual layers in these materials. MPG thanks the Alexander von Humboldt Foundation for financial support through HERMES program. [1] W. Wang, S. Dai, X. Li, J. Yang, D. J. Srolovitz and Q. Zheng, Nat. Commun. 6, 7853 (2015). 38 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 AFTERNOON SESSION (WA) Growth of one-dimensional polymers through on-surface reactions M. Abyazisania, J. Bradforda, N. Mottaa, J. Lipton-Duffina and J. MacLeoda a School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia. We present an investigation of the surface-confined growth of one-dimensional (1D) covalently interlinked polymers on metal surfaces formed through decarboxylative coupling of isophthalic acid (IPA) and 3,5 pyridinedicarboxylic acid (PDC). The reactions were studied by x-ray photoemission spectroscopy (XPS). Recently, Gao et al.[1] reported successful decarboxylative coupling facilitated via a three- step process. A schematic overview of the reaction pathway for IPA is shown in Fig.1. Figure 1.Schematic overview of the expected chemistry. The arrows indicate annealing, and each step should occur at a higher temperature than the previous one. IPA and PDC were deposited on Cu (111) followed by annealing a range of temperatures up to 300 °C, and the reactions were studied by XPS. The molecular structure can be inferred from the evolution of the C1s core level, where the signatures of dehydrogenation and decarboxylation are clearly evident [2]. XPS showed deprotonation and decarboxylation are completed upon annealing at 230° C and 270° C, respectively. The decarboxylation approach can be applied to many other carboxyl-terminated molecules to produce tailored 1D and 2D polymers with broad potential in nanotechnology. Such systems might be of central importance to develop future electronic and optoelectronic devices with high quality active materials, besides representing model systems for basic science investigations. Acknowledgements This research was undertaken on the Soft X-Ray beamline at the Australian Synchrotron, part of ANSTO. We acknowledge the Australian Synchrotron for travel support to perform these experiments. Some data were also obtained at the Central Analytical Research Facility operated by the Institute for Future Environments (QUT). [1] Gao, H.-Y., P. A. Held, M. Knor, C. Mück-Lichtenfeld, J. Neugebauer, A. Studer and H. Fuchs, Journal of the American Chemical Society 136(27): 9658-966, (2014). [2] Payer, D., A. Comisso, A. Dmitriev, T. Strunskus, N. Lin, C. Wöll, A. DeVita, J. V. Barth and K. Kern, Chemistry–A European Journal 13(14): 3900-3906, (2007). 39 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 AFTERNOON SESSION (WA) The limit of superelasticity of glassy carbon following compression B.A. Cooka, T.B. Shiellb, D.R. McKenziec, M. Fielda, B. Haberld, R. Boehlerd,e, J.E. Bradbyb, and D.G. McCullocha a School of Science, RMIT University, Melbourne, VIC, Australia b Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, ACT , Australia c School of Physics, The University of Sydney, NSW, Australia d Chemical and Engineering Materials Division, Oak Ridge National Laboratory, TN, USA e Geophysical Laboratory, Carnegie Institution of Washington, NW Washington, DC, USA Glassy carbon (GC) is a predominately sp2 bonded disordered carbon material which is temperature resistant up to ~3000°C making it a non-graphitizing carbon and is superelastic meaning that it retains its original structure following compression [1]. The pressure limits for these properties are not known. In this study, the structural changes in GC after compression in a diamond anvil cell at room temperature are investigated. Figure 1(a) shows a transmission electron microscopy (TEM) image of uncompressed GC showing its tangled graphitic microstructure (red circle). Also shown is a selected area diffraction pattern (SADP) (inset) which can be indexed to graphite. Figure 1(b) shows an image of a GC sample recovered after compression to 45 GPa. The tangled graphitic microstructure of GC has clearly changed with the SADP (inset) showing strong permanent orientation of graphitic layers as indicated by the strong {002} arcs oriented parallel to the high stress direction. These TEM results along with measurements obtained from Raman spectroscopy reveal that the threshold for permanent structural change in GC occurs at ~40 GPa. We propose that this pressure also represents the limit to the non-graphitizing and superelastic properties of GC. [1]. G. M. Jenkins and K. Karamura, Polymeric Carbons, (Cambridge University Press, 1976). Figure 1. TEM images and SADPs (indexed to graphite) of (a) uncompressed GC and (b) GC following compression to 45 GPa. The compression direction is shown by arrows. 40 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 WEDNESDAY, JANUARY 31 AFTERNOON SESSION (WA) Direct energy gap in light rare earth nitrides: EuN and SmN. Muhammad Azeem a Department of Applied Physics and Astronomy, University of Sharjah, Sharjah 27272, United Arab Emirates. Due to their proximity in the periodic table, the light rare earth metals, samarium and europium, are of particular interest because of their antiparallel L and S moments according to Hund’s rule. On the optical energy gaps, there are a few reports for SmN and EuN. The energy gap as obtained from X-ray absorption and emission (XAS/XES) Spectra[1] of SmN thin films is 1.5 eV, noticeably larger than the 0.70 eV of bulk SmN crystals.[2] The theoretically estimated direct gap at the X point is 0.81 eV and an indirect gap at Γ-X is 0.48 eV when T>TC [2]. Similarly for EuN, experimental values of Eg = 0.76 eV and 0.90 eV are appreciably different from the theoretical value of 1.20 eV. The direct energy gap for SmN and EuN is determined for the first time by transmittance and reflectance spectra for polycrystalline thin films at room temperature. SmN shows a direct optical energy gap at 1.2±0.05 eV and for EuN the energy gap value is 0.90±0.05 eV. Both samples show large effects due to free carriers in the subgap region. The fundamental absorption edge for SmN coincides with that of DyN indicating that both materials have similar electronic structure. For the case of EuN, a QSGW band structure calculation engineered to the experimentally determined energy gap value predicts a semiconducting ground state for EuN. [1] Preston, A. R. H.; Granville, S.; Housden, D. H.; Ludbrook, B.; Ruck, B. J.;Trodahl, H. J.; Bittar, A.;Williams, G. V. M.; Downes, J. E.; DeMasi, A.; Zhang, Y.;Smith, K. E.; Lambrecht, W. R. L. Physical Review B 76, 245120 (2007) [2] Hulliger, F. Chapter 33 Rare earth pnictides. In Handbook on the Physics and Chemistry of Rare Earths; Karl A. Gschneidner, J., LeRoy, E., Eds.; Elsevier, 1979; Vol. 4, pp 153–236. 41 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 MORNING SESSION (TM) Minerals at the atomic scale – new frontiers in atom probe tomography J. M. Cairney, A. La Fontaine, F. Exerier The Australian Centre for Microscopy and Microanalysis, The University of Sydney New South Wales 2006 Australia Atom probe tomography is a powerful microscopy technique that provides beautiful three- dimensional ‘maps’ that show the position and elemental species of tens of millions of atoms in a given volume within a material, with a resolution on par with the most advanced electron microscopes. It has seen widespread use for the characterisation of bulk metals and alloys, but new developments in specimen preparation and the use of lasers to enable the study of less conducting materials have now made it applicable to the study of a much wider range of material types. Our atom probe techniques, originally driven by the needs of researchers investigating structural materials, has proven useful in other disciplines. This presentation will include recent work with geoscientists that provides information to more accurately date zircon, i.e., to determine the age of rocks. Atom probe data, reveals that the lead (Pb) used to date the mineral can diffuse through regions of the rocks that have experienced deformation events [1]. This information is essential for accurate geochronological dating, showing that measurements from deformed areas of zircon are not as robust as previously thought. The presentation will also cover work undertaken in collaboration with dental researchers to provide the first-ever atom maps from human dental enamel, the decay of which affects 60- 90% of children and nearly 100% of adults worldwide. The results provided the first direct evidence for the presence of a proposed amorphous Mg-rich calcium phosphate phase that plays an essential role in governing the properties of teeth [2]. The impact of these findings are expected to be wide-reaching: Treatments to avoid decay will be designed to protect against the dissolution of this specific amorphous phase, mechanical models will incorporate the true properties of the binding phase and research into methods to remineralise teeth will be able to incorporate a better understanding of how enamel forms. [1] S. Piazolo, A. La Fontaine, P. Trimby, L. Yang, S. Harley, R. Armstrong, J.M. Cairney, Nature Comm., 7, 10490 (2016). [2] A. La Fontaine, A. Zavgorodniy, H. Liu, R. Zheng, M. Swain and J.M. Cairney, Sci. Adv., 2, e1601145, , 2016. 42 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 MORNING SESSION (TM) Optically Stimulated Luminescence and 2-D Dosimetry using Fluoroperovskites A.S. Madathiparambila and G.V.M. Williamsa,b a School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand. b The MacDiarmid Institute for Advanced Materials and Nanotechnology, SCPS, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand. There is a need for development of new dosimeter materials for applications like radiotherapy and 2-D imaging for medical diagnostics. This can be achieved by using tissue equivalent NaMgF3 that is known to exhibit optically stimulated luminescence (OSL) when doped with Eu and Mn [1,2]. Hence they have the potential to be developed as a suitable material for 2 D imaging in radiotherapy and medical diagnostics. In this work, we present the OSL and dose characterization of Mn doped NaMgF3 and X-ray imaging of 2D dosimetric plates of Eu doped NaMgF3 using a CCD camera. OSL is observed from different percentages of Mn doped NaMgF3 by exciting at 397 nm. The dose response is observed to be linear for lower dose ranges. Films of Eu doped NaMgF3 are prepared by grinding them and formulating a paint which are coated on to Perspex sheets. X-ray imaging of the films are made after exposing them to different doses of x-ray by using the CCD camera. The stimulation is by using an ultrabright blue LED with a peak wavelength of 465 nm which is in the range of wavelengths that stimulate OSL from the active material of the imaging plates. The resolution of the imaging plates are measured by using a standard test grid of lead lines of varying spatial frequency and the sensitivity and inhomogeneities of the films are also studied. Thus, it establishes the possibility to use Mn doped NaMgF3 as an OSL dosimeter in the linear range of the dose response and demonstrates the potential of Eu doped NaMgF3 films to be developed as a 2D dosimeter. [1] C. Dotzler, G.V.M. Williams, U. Rieser, A. Edgar, Appl. Phys. Lett. 91, 12190 (2007). [2] J.J. Schuyt and G.V.M Williams, J. Appl. Phys. 122, 063107 (2017). 43 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 MORNING SESSION (TM) Fluoroperovskites as Radiation Dosimeter Materials J.J. Schuyta and G.V.M. Williamsa,b a School of Physical and Chemical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand. b The MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand. There is a need for new radiation dosimeter materials, particularly in the field of radiotherapy. Fluoroperovskites (ABF3) have great potential as novel optics-based dosimeters because they are known to display optically stimulated luminescence (OSL), radioluminescence (RL), and thermoluminescence (TL) when doped with luminescent ions [1,2]. RL and OSL-based dosimeters are particularly advantageous since they allow the dose rate and total dose to be monitored, respectively [1-3]. However, OSL measurements erase the dose information and this makes it difficult to monitor cumulative doses. Furthermore, high energy irradiation produces Cerenkov radiation, which affects uncertainty when RL is used to record dose rates. This talk presents the results of studies on bulk and nanoparticle NaMgF3 and KMgF3 doped with luminescent ions (Eu, Mn and Sm). Optical absorption, RL, TL, OSL, and conductivity measurements were made before, during, and after exposure to x-ray irradiation. RL is observed that increases with the dose rate and is independent of dose history for nanoparticles after a predose. Optical absorption occurs after irradiation due to point defects that result in OSL and TL. F-centre/Mn complexes are observed and we show that they can be used to provide non-destructive measurements of the total and cumulative doses. Radiation-induced conductivity is seen during irradiation that can be used to record the dose rate. This is especially useful for high energy irradiations where Cerenkov light can be a problem in RL- based dosimeters. Thus, we show that the fluoroperovskites have potential as radiation dosimeters operating in all-optical and electronic modes. [1] J. J. Schuyt and G.V.M. Williams, J. Appl. Phys. 122, 063107 (2017). [2] J. Donaldson and G.V.M. Williams, J. Lumin. 173, 279 (2016). [3] S. W. S. McKeever et. al., Rad. Prot. Dos. 109, 269 (2004). 44 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 MORNING SESSION (TM) Defect Mechanisms in BaTiO3-BiMO3 (M = metal) Ceramics Nitish Kumara,g, Eric A. Pattersonb,c, Till Frömlingb, Edward P. Gorzkowskic, Peter Eschbache, Ian Lovea, Michael P. Müllerf, Roger A. De Souzaf, Julie Tuckera, Steven R. Reesed, and David P. Canna a Materials Science, Oregon State University, USA b Institute of Materials Science, Technische Universität Darmstadt, Germany c US Naval Research Laboratory, Washington, USA d School of Nuclear Science and Engineering, Oregon State University, USA e College of Science, Oregon State University, Corvallis, USA f Institute of Physical Chemistry, RWTH Aachen University, Germany g Materials Science and Engineering, The University of New South Wales, Sydney, Australia Addition of BiMO3 to BaTiO3 (BT) helps improve their properties for energy storage applications across length scales. This is intimately related to their underlying defect mechanisms and transport properties, which are not well-understood. On adding BiMO3 to BT, the resistivity values are often improved significantly (>2 orders of magnitude) and there is a simultaneous shift to n-type conduction from p-type for BT. Using a specific BiMO3, i.e. Bi(Zn1/2Ti1/2)O3 (BZT), several prospective candidates for this n-type behavior in BT-BZT were investigated such as loss of volatile cations, oxygen vacancies, bismuth present in multiple valence states and precipitation of secondary phases. Combined x-ray and neutron diffraction, prompt gamma neutron activation analysis and electron energy loss spectroscopy suggested much higher oxygen vacancy concentration in BT-BZT ceramics as compared to BT alone. X-ray photoelectron spectroscopy and x-ray absorption spectroscopy did not suggest presence of bismuth in multiple valence states. At the same time, using transmission electron microscopy, some secondary phases were observed, whose compositions were such that they could result in effective donor doping in BT-BZT ceramics. Using experimentally determined thermodynamic parameters for BT and slopes of Kröger-Vink plots, it has been suggested that an ionic compensation mechanism is prevalent in these ceramics instead of electronic compensation. These defects have an effect of shifting the conductivity minimum in Kröger-Vink plots to higher oxygen partial pressure values in BT-BZT ceramics as compared to BT, resulting in a significantly higher resistivity values in air atmosphere and an n-type behavior. This provides an important tool to tailor transport properties and defects in BT-BiMO3 ceramics, to make them better suited for dielectric or other applications. 45 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 MORNING SESSION (TM) Ion Microscopy: From Ion Solid Interactions to Real World Applications A. Wolffa a Central Analytical Research Facility, Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia. Ion microscopy is an exciting and emerging technology with a vast range of applications from materials characterization to nanostructuring. The talk will start off with an introduction to FIB/SEMs, which combine a gallium Focused Ion Beam (FIB) and a Scanning Electron Microscope (SEM). FIB/SEMs are a versatile tool for materials analysis and nanostructuring and are most commonly used to reveal internal sample structures at high resolution (cross-sectioning), to reconstruct a 3D model of the sample via a slice and view process and to prepare TEM-lamellas (sections) or samples for Atom Probe Tomography at precisely selected points within the sample which cannot be achieved by other techniques. In addition, FIB/SEMs are commonly used to fabricate nanoporous arrays or plasmonic devices [1-3]. The first part of the talk will conclude with a discussion about the ion solid interactions and the most commonly found process induced artefacts and ways to avoid them. The presentation will then focus on introducing the more recent Helium/Neon Ion Microscopy (HIM) which excels at high resolution surface imaging of conductive and non-conductive samples while outperforming the Focused Ion Beam (FIB) at sub 10nm structuring [4]. [1] N. Yao, Focused Ion Beam Systems Basics and Applications (Cambridge, 2007) [2] L. A. Giannuzzi, F.A. Stevie, Introduction to Focused Ion Beams (Springer, 2005) [3] J.R. Michael, Microsc. Microanal 12, 2 (2006) [4] G. Hlawacek, A. Goelzhaeuser, Helium Ion Microscopy (Springer, 2016) 46 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 NOON SESSION (TN) On-Surface Synthesis of Trinuclear Coordination Nanostructures C. Krulla, M. Castellia, P. Hapalab, D. Kumara, P. Jelinekb and A. Schiffrina, c a School of Physics & Astronomy, Monash University, Clayton, Victoria 3800, Australia b Institute of Physics of the Czech Academy of Science, Prague 16200, Czech Republic c ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Monash University, Clayton, Victoria 3800, Australia. Multimetallic complexes are molecular compounds composed of organic ligands coordinated with several metal atoms. These systems exhibit chemical and electronic properties that allow for a vast range of applications, in particular in the area of catalysis [1]. Yet, their synthesis remains challenging. On-surface supramolecular chemistry – a bottom-up approach driven by noncovalent interactions between molecules and atoms on a surface – allows for the design of atomically precise organic and metal-organic nanomaterials [2], whose morphology, properties and functionalities can differ dramatically from those of compounds obtained via conventional synthetic chemistry. Here, I will describe the bottom-up synthesis of one-dimensional coordination nanostructures on a noble metal surface, where the coordination motif is based on an iron-terpyridine interaction borrowed from functional metal-organic complexes used in photovoltaic and catalytic applications. By a combination of low-temperature scanning tunneling microscopy (STM) and spectroscopy, STM manipulation, non-contact atomic force microscopy and density functional theory, I will show that the metal-ligand coordination motif consists of coplanar head-to-head terpyridine groups linked via a linear tri-iron cluster. This unusual metal-organic structure not been observed from conventional solution-based synthetic chemistry methods, and is enabled by the bottom-up on-surface synthesis, opening the door to novel pathways for the engineering of nanomaterials with tailored electronic, catalytic and magnetic functionalities. [1] A.L. Gavrilova, B. Bosnich, Chem. Rev. 104, 349 (2004). [2] J.V. Barth, Annu. Rev. Phys. Chem. 58, 375 (2007). 47 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 NOON SESSION (TN) Lateral graphene/h-BN heterostructures from chemically converted epitaxial graphene on SiC (0001) J. Bradforda, J. Lipton-Duffina, M. Shafieia,b, J. MacLeoda and N. Mottaa a School of Chemistry, Physics & Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia. b Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia. Graphene has attracted a great deal of interest due to its remarkable properties, but as a zero- bandgap semimetal its full potential for next generation electronic devices is yet to be realized. Unlocking its potential for future applications in nanoelectronics will depend critically on the development of novel approaches to introducing a bandgap while preserving carrier mobility. In-plane heterostructures of graphene and its insulating analogue, h-BN, have been predicted to allow tuning of the bandgap and carrier mobility according to the carbon concentration [1]. Such hybrid structures have previously been synthesized by CVD on metal foils, and patterned using photolithography/reactive ion etching followed by a second growth step, before transfer onto insulating substrates [2]. In this research lateral graphene/h-BN heterostructures are grown on directly on 6H- and 4H- SiC (0001) by topological conversion of epitaxial graphene. Graphene can be chemically converted to h-BN upon heated exposure to ammonia (NH3) and boric acid (H3BO3) vapors, and the concentration of h-BN can be controlled by limiting the reaction time [3]. By x-ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM), we observe the substitution of h-BN domains in the epitaxial graphene layer. The reaction nucleates at defects or functionalized carbon atoms which we confirm by Raman spectroscopy. This technique allows the growth of semiconducting hybrid atomic layers with tunable properties directly on a substrate suitable for device fabrication. [1] Wang, J., et. al., Small 9(8) 1373 (2013) [2] Liu, Z., et. al., Nat Nanotechnol 8(2) 119 (2013) [3] Gong, Y., et. al., Nat Commun 5 3193 (2014) 48 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 NOON SESSION (TN) Electronic Structure of Titania Surfaces Modified by Au Clusters H. S Al Qahtani1, G. F. Metha2, V. B. Golovko3, G. Krishnan1, G. G. Andersson1 1 Flinders Centre for NanoScale Science and Technology, Flinders University, Australia 2 Department of Chemistry, The University of Adelaide, Australia 3 The MacDiarmid Institute for Advanced Materials and Nanotechnology, Department of Chemistry, University of Canterbury, New Zealand. gunther.andersson@flinders.edu.au Metal clusters with a size of less than 100 atoms are suitable for modifying the electronic properties of semiconductor surfaces. [1, 2] In order to avoid agglomeration of the metal clusters and in order to retain their specific electronic structures, the coverage of the surface with metal clusters has to be kept below 10%. The main challenges in this field are a) to maintain the size and thus the properties of the metal clusters and b) to determine the electronic structure of the clusters. The first challenge is considered as one of the main challenges in the field of surface modification with metal clusters can be addressed by introducing defects on the metal oxide surface, specifically oxygen vacancies. The second challenge can be addressed by using experimental techniques which are exclusively sensitive for the electronic structure of the outermost layer. Metastable Induced Electron Spectroscopy (MIES) is such a technique and has been used successfully to determine the change in electronic structure due to the deposition of Au clusters. Applying techniques such as singular value decomposition, the changes of the electronic structure can even be quantified. [2] [1] D. P. Anderson, J. F. Alvino, A. Gentleman, H.Al Qahtani, L. Thomsen, G. F. Metha, V. B. Golovko, and G. G. Andersson, PCCP 15 3917 (2013) [2] G. G. Andersson, V. B. Golovko, J. F. Alvino, T. Bennett, O. Shipper, S. M. Mejia, H. Al Qahtani, R. Adnan, N. Gunby, D. P. Anderson, and G. F. Metha. J. Chem. Phys. 141 014702 (2014). 49 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 NOON SESSION (TN) Charge order in a frustrated two-dimensional atom lattice Stephan Rachela, F.Adlerb, M.Laubachc, A.Fleszarb, J.Maklarb , J.Schäferb and R. Claessenb a School of Physics, University of Melbourne, Parkville, Victoria, Australia. b Physikalisches Institut, University of Würzburg, Germany. c Institut für Theoretische Physik, Technical University of Dresden, Germany The triangular lattice of localised electrons is the canonical example for a geometrically frustrated spin arrangement. As a consequence, strong local Coulomb interactions lead to a competition of antiferromagnetic order and spin liquid behaviour. However, when longer- ranged Coulomb interactions become relevant, charge order can emerge. Thus, contingent on the competing energy scales, an even richer phase diagram must be expected. Yet, candidate material are rather limited. Here we show that Sn/Si(111) [1] and Pb/Si(111) are excellent realisations of an extended Hubbard model. In our study of the Pb atom lattice on silicon using scanning tunneling microscopy, we detect a charge-ordered state not previously known. We employ an extended variational cluster approach to determine the full interacting phase diagram, which finds charge order driven by longer-ranged interactions, and in competition with magnetic order. By exploiting the tunability of correlation strength, hopping parameters and bandfilling, this material class represents a promising platform to search for exotic states of matter, in particular, for chiral topological superconductivity. [1] Li et al., Nat. Commun. 4, 1620 (2013). 50 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 NOON SESSION (TN) The role of halogens in on-surface Ullmann polymerization J. Lipton-Duffina, G. Galeottib, M. Di Giovannantonioc, M. Ebrahimib, S. Tebic, A. Verdinid, L. Floreanod, Y. Fagot-Revurate, D. F. Perepichka f, F. Roseib and G. Continic g a School of Chemistry, Physics and Mechanical Engineering, and Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia. b Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, Varennes, QC J3X 1S2, Canada cIstituto di Struttura della Materia, CNR, 00133 Roma, Italy. d Istituto Officina dei Materiali CNR, Laboratorio TASC, 34149 Trieste, Italy e Institut Jean Lamour, Université Lorraine/CNRS, Vandoeuvre-les-Nancy, France f Department of Chemistry, McGill University, Montreal, QC H3A 0B8, Canada g Department of Physics, University of Rome Tor Vergata, 00133 Roma, Italy. Ullmann coupling is commonly used to form surface-confined one- and two-dimensional conjugated structures from haloaryl derivatives. This methodology is simple and can be reliably tracked by photoelectron spectroscopy and scanning probe microscopy.[1] However, the halogen atoms that control the reaction also influence the reaction rate and topology of the products, even when they act as spectators that do not participate in the chemistry. We demonstrate this effect using five different 1,4-dihalobenzene molecules containing chlorine, bromine, and iodine deposited on Cu(110) using scanning tunneling microscopy, fast-X-ray photoelectron and near edge X-ray absorption fine structure spectroscopies. The influence of the halogens can be understood by a kinetic model that describes the motion of both the organic precursors[2] and the detached halogen atoms hosted on the surface as a function of the reaction temperature. We find distinct diffusion barriers for the different halogen species, and these diffusing byproducts exert a significant influence on the growth of the polymers. Producing polymers from on-surface Ullman coupling is therefore critically influenced by the choice of capping species and this must be taken into consideration when designing novel materials. [1] J. Lipton-Duffin, O. Ivasenko, D. Perepichka and F. Rosei, Small, 5, 592–597 (2009). [2] M. Di Giovannantonio, M. Tomellini, J. Lipton-Duffin et al., J. Am. Chem. Soc., 138, 16696–16702 (2016). [3] G. Galeotti, M. Di Giovannantonio, J. Lipton-Duffin et al., Faraday Discuss., 204, 453- 469 (2017). 51 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 AFTERNOON SESSION (TA) Boron Nitride Nanotubes, Nanoparticles and Nanosheets D. Golberg a School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia. Boron nitride (BN) nanomaterials are well known counterparts of the famous Carbon (C) ones. Nanotubes, nanoparticles are graphene-like nanosheets are similarly form in this system and have been found to be very promising for diverse practical applications due to the unique combination of electrical insulation, oxidation resistance, high thermal conductivity, huge tensile strength and Young’s modulus, superb hydrophobicity and lubricant properties [1-8]. In this presentation I will detail many functional properties of these nanostructures, in many occasions first measured using original methods of in situ high resolution transmission electron microscopy (HRTEM) [3-6]. An overview of originally developed synthetic techniques of BN nanostructures and thorough analysis of their physical, mechanical and chemical properties will be followed by the illustration of most recent examples of their applications in polymer and metal matrix composites, water purifiers, drug carriers, hydrogen accumulators, photocatalysts, light sensitizers, and optical and magnetic components [7-11]. [1] D. Golberg et al. Appl. Phys. Lett. 69, 2045 (1996). [2] D. Golberg et al. Appl. Phys. Lett. 88, 123101 (2006) [3] D. Golberg et al. Acta Mater. 55, 1293 (2007). [4] D. Golberg et al. Nano Lett. 7, 2146 (2007). [5] D. Golberg et al. Adv. Mater. 19, 2413 (2007). [6] D. Golberg et al. ACS Nano 4, 2979 (2010). [7] Q. Weng, D. Golberg et al. ACS Nano 8, 6123 (2014). [8] A. Pakdel, Y. Bando and D. Golberg, Chem. Soc. Rev. 43, 934 (2014). [9] X. Li, D. Golberg et al. Nature Commun. 8, 13936 (2017). [10] Y. Xue, D. Golberg et al. ACS Nano 11, 558 (2017). [11] Q. Weng, D. Golberg et al. Adv. Mater. 29, 1700695 (2017). 52 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 AFTERNOON SESSION (TA) NanoPorous Graphene: topology vs. doping effects I. Di Bernardoa,b, G.Avvisatia, N. Mottab, C. Mariania and M.G. Bettia a Physics Department, Spienza Università di Roma, Roma, Italy. b School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia. The spatial arrangement of the honeycomb carbon network in graphene-based materials has a deep impact on their properties, for example the chirality of carbon nanotubes affects their conductance, the stacking between the carbon planes influences the carrier mobility etc. Compacting graphene into three-dimensional (3D) architectures in order to minimize the volume and increasing the surface area, while maintaining its very two-dimensional (2D) properties, is a current challenge. A viable method to synthesise graphene in 3D nanostructures is chemical vapour deposition (CVD) on Ni-based nanotemplates, leading to nanoporous graphene (NPG) with high interconnectivity, low defect density, hundreds of µm thickness and tunable pore size, spanning from 50 nm to 1 µm [1,2]. We present herewith an experimental study of the topological and N-doping effects on the electronic/vibrational structure and on the lattice network, for these bicontinuous 3D graphene architectures, composed by thousands of separated but interconnected graphene layers. A careful, spatially-resolved spectroscopic analysis carried of by state-of-the-art facilities (nano-photoemission and micro-Raman) allows the disentanglement of the different effects that the insertion of heteroatoms and the radius of curvature have on the NPG properties, ascertaining the homogeneity of the structure [3]. [1] I. Yoshikazu et al., Angewandte Chemie International Edition 53 (19), 4822 (2014) [2] I. Di Bernardo et al., ACS Omega, 2(7), 3691 (2017) [3] I. Di Bernardo et al., submitted. 53 The 42nd Condensed Matter and Materials Meeting WAGGA WAGGA, NSW | 30 JANUARY – 02 FEBRUARY 2018 THURSDAY, FEBRUARY 1 AFTERNOON SESSION (TA) Density and Molar Volume of AlCoCrCuFeNi high-entropy alloy family Yu. Plevachuka, J. Brillob and A. Yakymovycha,c a Department of Metal Physics, Ivan Franko National University of Lviv, Lviv 79005, Ukraine. b Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany. c Department of Inorganic Chemistry – Functional Materials, Faculty of Chemistry, University of Vienna, Vienna 1090, Austria. Continuous search of new inorganic materials with promising properties to replace existing conventional ones in the industry has been leading to the development of alloys with unique compositions, such as metal matrix composites (MMCs), nanostructured metal(metal oxide)/polymer composites, and high-entropy alloys (HEAs). It is quite complicated to predict the structure and properties of such materials due to the lack of experimental data related to interactions between structural constituents in those under different conditions. This essential prerequisite has been encouraging a blazing fast increase in articles related to these topics, especially HEAs. The main goal of the present study was to receive a set of reliable thermophysical data (density, molar volume) of the liquid phase of the AlCoCrCuFeNi HEA and their sub-system alloys. For experimental investigation, samples were prepared by arc-melting method. The measureme