Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 문순재 | - |
dc.date.accessioned | 2020-04-14T01:05:09Z | - |
dc.date.available | 2020-04-14T01:05:09Z | - |
dc.date.issued | 2019-04 | - |
dc.identifier.citation | npj Quantum Materials, v. 4, NO 17, Page. 1-8 | en_US |
dc.identifier.issn | 2397-4648 | - |
dc.identifier.uri | https://www.nature.com/articles/s41535-019-0157-0 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/150956 | - |
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 Y2Ir2O7 using optical spectroscopy. Three infrared-active phonons soften below the Néel temperature of TN ≈ 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. | en_US |
dc.description.sponsorship | We gratefully acknowledge useful discussions with K. W. Kim. This work was mainly supported by the Institute for Basic Science (IBS) in Korea (Grant No. IBS-R009-D1 and IBS-R009-G1). S. J. Moon was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (Grant No. NRF-2017R1A2B4009413). S. Y. Kim was supported by the Global Ph.D. Fellowship Program through NRF funded by the Ministry of Education (Grant No. NRF-2015H1A2A1034943). | en_US |
dc.language.iso | en | en_US |
dc.publisher | Springer Nature | en_US |
dc.subject | RAMAN-SPECTRA | en_US |
dc.subject | PHYSICS | en_US |
dc.subject | MULTIFERROICS | en_US |
dc.subject | SCATTERING | en_US |
dc.title | Unconventional spin-phonon coupling via the Dzyaloshinskii-Moriya interaction | en_US |
dc.type | Article | en_US |
dc.relation.no | 17 | - |
dc.relation.volume | 4 | - |
dc.identifier.doi | 10.1038/s41535-019-0157-0 | - |
dc.relation.page | 1-8 | - |
dc.relation.journal | npj Quantum Materials | - |
dc.contributor.googleauthor | Son, Jaeseok | - |
dc.contributor.googleauthor | Park, Byung Cheol | - |
dc.contributor.googleauthor | Kim, Choong H. | - |
dc.contributor.googleauthor | Cho, Hwanbeom | - |
dc.contributor.googleauthor | Kim, So Yeun | - |
dc.contributor.googleauthor | Sandilands, Luke J. | - |
dc.contributor.googleauthor | Sohn, Changhee | - |
dc.contributor.googleauthor | Park, Je-Geun | - |
dc.contributor.googleauthor | Moon, Soon Jae | - |
dc.contributor.googleauthor | Noh, Tae Won | - |
dc.relation.code | 2019045230 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF NATURAL SCIENCES[S] | - |
dc.sector.department | DEPARTMENT OF PHYSICS | - |
dc.identifier.pid | soonjmoon | - |
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