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

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-

SUBMITTER: Nguyen TMH 

PROVIDER: S-EPMC5557926 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature