Magnetic excitations of the charge stripe electrons below half doping in La2−xSrxNiO4 (x = 0.45, 0.4)

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dc.contributor.authorFreeman, PGen_AU
dc.contributor.authorGiblin, SRen_AU
dc.contributor.authorHradil, Ken_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorCermak, Pen_AU
dc.contributor.authorPrabhakaran, Den_AU
dc.date.accessioned2024-10-03T05:45:51Zen_AU
dc.date.available2024-10-03T05:45:51Zen_AU
dc.date.issued2017-02-03en_AU
dc.date.statistics2024-09-25en_AU
dc.description.abstractThe low energy magnetic excitation spectrum of charge stripe ordered La2-xSrxNiO4, x=0.4 and x=0.45 samples, were studied by neutron scattering. Two excitation modes are observed in both materials, one from the ordered magnetic moments, and a second mode consistent with pseudo-one-dimensional antiferromagnetic excitations of the charge stripe electrons (q-1D). The dispersion of the q-1D excitation follows the same relation as in x=1/3 composition, with even spectral weight in the two counterpropagating branches of the x=0.4 sample, however in the x=0.45 sample only one dispersion branch has any measurable spectral weight. The evolution of the q-1D excitations on doping to the checkerboard charge ordered phase is discussed. ©2017 American Physical Society.en_AU
dc.description.sponsorshipWe wish to acknowledge that crystal growth for this work was supported by the Engineering and Physical Sciences Research Council of Great Britain. We wish to acknowledge that this research project has been supported by the European Commission under the 6th Framework Programme through the Key Action: Strengthening the European Research Area, Research Infrastructures. Contract No. RII3-CT-2003-505925.en_AU
dc.identifier.articlenumber064403en_AU
dc.identifier.citationFreeman, P. G., Giblin, S. R., Hradil, K., Mole, R. A., Cermak, P., & Prabhakaran, D. (2017). Magnetic excitations of the charge stripe electrons below half doping in La2-xSr_xNiO4(x = 0.45, 0.4). Physical Review B, 95(6), 064403. doi:10.1103/PhysRevB.95.064403en_AU
dc.identifier.issn2469-9950en_AU
dc.identifier.issn2469-9969en_AU
dc.identifier.issue6en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.pagination064403-en_AU
dc.identifier.urihttps://doi.org/10.1103/physrevb.95.064403en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15702en_AU
dc.identifier.volume95en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectNickelen_AU
dc.subjectStrontiumen_AU
dc.subjectLanthanumen_AU
dc.subjectMagnetizationen_AU
dc.subjectElectronsen_AU
dc.subjectCrystal dopingen_AU
dc.subjectNeutronsen_AU
dc.titleMagnetic excitations of the charge stripe electrons below half doping in La2−xSrxNiO4 (x = 0.45, 0.4)en_AU
dc.typeJournal Articleen_AU
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