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Optical probe of Heisenberg-Kitaev magnetism in α−RuCl3

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Title
Optical probe of Heisenberg-Kitaev magnetism in α−RuCl3
Author(s)
Luke J. Sandilands; Chang Hee Sohn; Hyun Ju Park; So Yeun Kim; Kyung Wan Kim; Jennifer A. Sears; Young-June Kim; Tae Won Noh
Publication Date
2016-11
Journal
PHYSICAL REVIEW B, v.94, no.19, pp.195156
Publisher
AMER PHYSICAL SOC
Abstract
We report a temperature-dependent optical spectroscopic study of the Heisenberg-Kitaev magnet α−RuCl 3 . Our measurements reveal anomalies in the optical response near the magnetic ordering temperature. At higher temperatures, we observe a redistribution of spectral weight over a broad energy range that is associated with nearest-neighbor spin-spin correlations. This finding is consistent with highly frustrated magnetic interactions and in agreement with theoretical expectations for this class of material. The optical data also reveal significant electron-hole interaction effects, including a bound excitonic state. These results demonstrate a clear coupling between charge and spin degrees of freedom and provide insight into the properties of thermally disordered Heisenberg-Kitaev magnets. ©2016 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/3072
DOI
10.1103/PhysRevB.94.195156
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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