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강상관계 물질 연구단
강상관계 물질 연구단
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Two-magnon scattering in the 5d all-in-All-out pyrochlore magnet Cd2Os2O7

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Title
Two-magnon scattering in the 5d all-in-All-out pyrochlore magnet Cd2Os2O7
Author(s)
Thi Minh Hien Nguyen; Luke J. Sandilands; Changhee Sohn; Choong Hyun Kim; Aleksander L. Wysocki; In-Sang Yang; S.J. Moon; Jae-Hyeon Ko; J. Yamaura; Z. Hiroi; Tae Won Noh
Publication Date
2017-12
Journal
NATURE COMMUNICATIONS, v.8, no.1, pp.251 -
Publisher
NATURE PUBLISHING GROUP
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. © 2017 The Author(s)
URI
http://pr.ibs.re.kr/handle/8788114/3839
ISSN
2041-1723
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
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