Temperature effects in lattice dynamics of SnSe

Simple item page
dc.contributor.authorDanilkin, SAen_AU
dc.contributor.authorYu, DHen_AU
dc.contributor.authorDeng, GCen_AU
dc.contributor.authorPomjakushina, Een_AU
dc.contributor.authorLiu, Hen_AU
dc.contributor.authorKearley, GJen_AU
dc.date.accessioned2021-10-27T22:56:34Zen_AU
dc.date.available2021-10-27T22:56:34Zen_AU
dc.date.issued2016-11-29en_AU
dc.date.statistics2021-10-18en_AU
dc.description.abstractTin selenide demonstrates a record high thermoelectric figure of merit. The distinctive feature of this material is very low thermal conductivity directly related to peculiarities of SnSe lattice dynamics. We studied the temperature dependence of the crystal structure, phonon dispersion curves and vibrational density of states (VDOS) of SnSe in temperature range from 300 to 750 K using neutron scattering instruments at ANSTO. We found that frequencies of longitudinal and transverse acoustic phonons in SnSe have remarkably low frequencies, in particular the TA [100] phonon branch. Another feature of SnSe is the presence of low-frequency optic phonons in close proximity to acoustic branches and softening of TOb [100] mode. Measurements of VDOS during heating reveal rather complex modifications of the spectrum showing a significant softening of phonon groups centred at ~ 7.5 and 16 meV related to displacive Pnma – Cmcm phase transition at 830 K. The high density of low-energy modes along with observed strong phonon damping is probably responsible for the low values of lattice component of thermal conductivity in this material.en_AU
dc.identifier.citationDanilkin, S., Yu, D., Deng, G., Pomjakushina, E., Liu, H., & Kearley, G. (2016). Temperature effects in lattice dynamics of SnSe. Paper presented at 13th AINSE-ANBUG Neutron Scattering Symposium, Sydney, NSW, Australia, 29-30 November 2016.en_AU
dc.identifier.conferenceenddate30 November 2016en_AU
dc.identifier.conferencename13th AINSE-ANBUG Neutron Scattering Symposiumen_AU
dc.identifier.conferenceplaceSydney, NSW, Australiaen_AU
dc.identifier.conferencestartdate29 November 2016en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12149en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Nuclear Science and Engineeringen_AU
dc.subjectSelenidesen_AU
dc.subjectThermoelectric propertiesen_AU
dc.subjectThermal conductivityen_AU
dc.subjectCrystal structureen_AU
dc.subjectTemperature dependenceen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectANSTOen_AU
dc.titleTemperature effects in lattice dynamics of SnSeen_AU
dc.typeConference Abstracten_AU
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Abstract_Handbook_v2(1).pdf
Size:
1.87 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Conference Publications