Magnetic excitations of the Cu2+ quantum spin chain in Sr3CuPtO6

Leiner, J. C., Oh, Joosung, Kolesnikov, A. I., Stone, M. B., Le, Manh Duc, Kenny, E. P., Powell, B. J., Mourigal, M., Gordon, E. E., Whangbo, M. H., Kim, J. W., Cheong, S. W. and Park, Je-Geun (2018) Magnetic excitations of the Cu2+ quantum spin chain in Sr3CuPtO6. Physical Review B, 97 10: 1-8. doi:10.1103/PhysRevB.97.104426

Author Leiner, J. C.
Oh, Joosung
Kolesnikov, A. I.
Stone, M. B.
Le, Manh Duc
Kenny, E. P.
Powell, B. J.
Mourigal, M.
Gordon, E. E.
Whangbo, M. H.
Kim, J. W.
Cheong, S. W.
Park, Je-Geun
Title Magnetic excitations of the Cu2+ quantum spin chain in Sr3CuPtO6
Journal name Physical Review B   Check publisher's open access policy
ISSN 2469-9969
Publication date 2018-03-30
Year available 2018
Sub-type Article (original research)
DOI 10.1103/PhysRevB.97.104426
Open Access Status Not yet assessed
Volume 97
Issue 10
Start page 1
End page 8
Total pages 8
Place of publication College Park, MD United States
Publisher American Physical Society
Language eng
Subject 2504 Electronic, Optical and Magnetic Materials
3104 Condensed Matter Physics
Abstract We report the magnetic excitation spectrum as measured by inelastic neutron scattering for a polycrystalline sample of Sr3CuPtO6. Modeling the data by the 2+4 spinon contributions to the dynamical susceptibility within the chains, and with interchain coupling treated in the random phase approximation, accounts for the major features of the powder-averaged structure factor. The magnetic excitations broaden considerably as temperature is raised, persisting up to above 100 K and displaying a broad transition as previously seen in the susceptibility data. No spin gap is observed in the dispersive spin excitations at low momentum transfer, which is consistent with the gapless spinon continuum expected from the coordinate Bethe ansatz. However, the temperature dependence of the excitation spectrum gives evidence of some very weak interchain coupling.
Keyword Total-Energy Calculations
Augmented-Wave Method
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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Created: Fri, 13 Apr 2018, 09:30:56 EST