Einstein-de Haas effect of topological magnons

Jun Li, Trinanjan Datta, Dao Xin Yao

Research output: Contribution to journalArticlepeer-review

Abstract

We predict the existence of the Einstein-de Haas effect in topological magnon insulators. Temperature variation of angular momentum in the topological state shows a sign change behavior, akin to the low temperature thermal Hall conductance response. This manifests itself as a macroscopic mechanical rotation of the material hosting topological magnons. We show that an experimentally observable Einstein-de Haas effect can be measured in the square-octagon, the kagome, and the honeycomb lattices. Albeit, the effect is the strongest in the square-octagon lattice. We treat both the low and the high temperature phases using spin wave and Schwinger boson theory, respectively. We propose an experimental set up to detect our theoretical predictions. We suggest candidate square-octagon materials where our theory can be tested.

Original languageEnglish (US)
Article number023248
JournalPhysical Review Research
Volume3
Issue number2
DOIs
StatePublished - Jun 2021

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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