View : 22 Download: 0

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

Title
Two-magnon scattering in the 5d all-in-All-out pyrochlore magnet Cd2Os2O7
Authors
Nguyen T.M.H.Sandilands L.J.Sohn C.H.Kim C.H.Wysocki A.L.Yang I.-S.Moon S.J.Ko J.-H.Yamaura J.Hiroi Z.Noh T.W.
Ewha Authors
양인상
SCOPUS Author ID
양인상scopus
Issue Date
2017
Journal Title
Nature Communications
ISSN
2041-1723JCR Link
Citation
vol. 8, no. 1
Publisher
Nature Publishing Group
Indexed
SCI; SCIE; SCOPUS WOS scopus
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).
DOI
10.1038/s41467-017-00228-w
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
Files in This Item:
There are no files associated with this item.


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE