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Sohn, Chang Hee
Laboratory for Unobtainable Functional Oxides
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dc.citation.number 1 -
dc.citation.startPage 17 -
dc.citation.title NPJ QUANTUM MATERIALS -
dc.citation.volume 4 -
dc.contributor.author Son, Jaeseok -
dc.contributor.author Park, Byung Cheol -
dc.contributor.author Kim, Choong H. -
dc.contributor.author Cho, Hwanbeom -
dc.contributor.author Kim, So Yeun -
dc.contributor.author Sandilands, Luke J. -
dc.contributor.author Sohn, Chang Hee -
dc.contributor.author Park, Je-Geun -
dc.contributor.author Moon, Soon Jae -
dc.contributor.author Noh, Tae Won -
dc.date.accessioned 2023-12-21T19:13:29Z -
dc.date.available 2023-12-21T19:13:29Z -
dc.date.created 2019-05-23 -
dc.date.issued 2019-04 -
dc.description.abstract Spin-phonon coupling (SPC) plays a critical role in numerous intriguing phenomena of transition metal oxides (TMOs). In 3d and 4d TMOs, the coupling between spin and lattice degrees of freedom is known to originate from the exchange interaction. On the other hand, the origin of SPC in 5d TMOs remains to be elucidated. To address this issue, we measured the phonon spectra of the 5d pyrochlore iridate Y 2 Ir 2 O 7 using optical spectroscopy. Three infrared-active phonons soften below the Néel temperature of T N ≈ 170 K, indicating the existence of strong SPC. Simulations using density functional theory showed that the coupling is closely related to the Ir–O–Ir bond angle. A tight-binding model analysis reveals that this SPC is mainly mediated by the Dzyaloshinskii–Moriya interaction rather than the usual exchange interaction. We suggest that such unconventional SPC may be realized in other 5d TMOs with non-collinear magnetic order. -
dc.identifier.bibliographicCitation NPJ QUANTUM MATERIALS, v.4, no.1, pp.17 -
dc.identifier.doi 10.1038/s41535-019-0157-0 -
dc.identifier.issn 2397-4648 -
dc.identifier.scopusid 2-s2.0-85065070191 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/30504 -
dc.identifier.url https://www.nature.com/articles/s41535-019-0157-0 -
dc.identifier.wosid 000470240800002 -
dc.language 영어 -
dc.publisher Nature Publishing Group -
dc.title Unconventional spin-phonon coupling via the Dzyaloshinskii–Moriya interaction -
dc.type Article -
dc.description.isOpenAccess TRUE -
dc.type.docType Article -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -

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