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강상관계 물질 연구단
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Strong Spin-Phonon Coupling Mediated by Single Ion Anisotropy in the All-In-All-Out Pyrochlore Magnet Cd2Os2 O7

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Title
Strong Spin-Phonon Coupling Mediated by Single Ion Anisotropy in the All-In-All-Out Pyrochlore Magnet Cd2Os2 O7
Author(s)
Chang Hee Sohn; Choong Hyun Kim; Luke James Sandilands; Thi Minh Hien Nguyen; So Yeon Kim; Hyun Ju Park; Kim K.W.; Moon S.J.; Yamaura J.; Hiroi Z.; Tae Won Noh
Publication Date
2017-03
Journal
PHYSICAL REVIEW LETTERS, v.118, no.11, pp.117201 -
Publisher
AMER PHYSICAL SOC
Abstract
Spin-phonon coupling mediated by single ion anisotropy was investigated using optical spectroscopy and first-principles calculations in the all-in-all-out pyrochlore magnet Cd2Os2O7. Clear anomalies were observed in both the phonon frequencies and linewidths at the magnetic ordering temperature. The renormalization of the phonon modes was exceptionally large, signifying the presence of an unconventional magnetoelastic term from large spin-orbit coupling. In addition, the relative phonon frequency shifts show a strong correlation with the modulation of noncubic crystal field by the corresponding lattice distortion. Our observation establishes a new type of spin-phonon coupling through single ion anisotropy, a second-order spin-orbit coupling term, in Cd2Os2O7. © 2017 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/3559
ISSN
0031-9007
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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Strong Spin-Phonon Coupling Mediated by Single Ion Anisotropy in the All-In-All-Out Pyrochlore Magnet Cd2Os2O7_노태원.pdfDownload

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