Two-magnon scattering in the 5d all-in-all-out pyrochlore magnetCd2Os2O7

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486607.do
DOI
10.1038/s41467-017-00228-w
Title
Two-magnon scattering in the 5d all-in-all-out pyrochlore magnetCd2Os2O7
Description
This work was supported by the Research Center Program of IBS (Institutefor Basic Science) in Korea (IBS-R009-D1). S.J.M. acknowledges thesupport by Basic Science Research Program through the National ResearchFoundation of Korea (NRF) funded by the Ministry of Science, ICT, andFuture Planning (2014R1A2A1A11054351 and 2017R1A2B4009413). I.-S.Y.acknowledges the support by the National Research Foundation of Korea(NRF) grant funded by the Korea government (MSIP) (No. 2015001948).J.-H.K. acknowledges the support by the National Research Foundation ofKorea (NRF) grant funded by the Korea government (MSIP)(NRF-2016R1A2B4012646). The work at Ames Laboratory was supported by theCritical Materials Institute, an Energy Innovation Hub funded by theU.S. Department of Energy (DOE). AmesLaboratory is operated for the U.S.DOE by Iowa State University under contract #DEAC02-07CH11358. T.M.H.N.thanks Dr Manh Cuong Nguyen from Ames Laboratory, U.S. DOE for helpfuldiscussions.
abstract
5d pyrochlore oxides with all-in-all-out magnetic order are prime candidates for realizing strongly correlated, topological phases of matter. Despite significant effort, a full understanding of all-in-all-out magnetism remains elusive as the associated magnetic excitations have proven difficult to access with conventional techniques. Here we report a Raman spectroscopy study of spin dynamics in the all-in-all-out magnetic state of the 5d pyrochlore Cd2Os2O7. Through a comparison between the two-magnon scattering and spin-wave theory, we confirm the large single ion anisotropy in this material and show that the Dzyaloshinskii-Moriya and exchange interactions play a significant role in the spin-wave dispersions. The Raman data also reveal complex spin-charge-lattice coupling and indicate that the metal-insulator transition in Cd2Os2O7 is Lifshitz-type. Our work establishes Raman scattering as a simple and powerful method for exploring the spin dynamics in 5d pyrochlore magnets.
provenance
Made available in Cube on 2018-09-28T16:12:08Z (GMT). No. of bitstreams: 0
language
English
author
Thi Minh Hien Nguyen
Sandilands, Luke J.
Sohn, C. H.
Kim, C. H.
Wysocki, Aleksander L.
Yang, In-Sang
Moon, S. J.
Ko, Jae-Hyeon
Yamaura, J.
Hiroi, Z.
Noh, Tae Won
accessioned
2018-09-28T16:12:08Z
available
2018-09-28T16:12:08Z
issued
2017
citation
NATURE COMMUNICATIONS(8)
issn
2041-1723
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486607.do
Funder
과학기술정보통신부
Funding Program
기초과학연구원연구운영비지원
Project ID
1711061424
Jurisdiction
Rep.of Korea
Project Name
Studies on Correlated Electron Systems
rights
openAccess
type
article


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