Magnon Landau Levels and Spin Responses in Antiferromagnets

Li, Bo; Kovalev, Alexey

doi:10.1103/PhysRevLett.125.257201

Magnon Landau Levels and Spin Responses in Antiferromagnets

Journal Article · Mon Dec 14 00:00:00 EST 2020 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.125.257201· OSTI ID:1755211

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Univ. of Nebraska, Lincoln, NE (United States); University of Nebraska - Lincoln
Univ. of Nebraska, Lincoln, NE (United States)

We study gauge fields produced by gradients of the Dzyaloshinskii-Moriya interaction and propose a model of an AFM topological insulator of magnons. In the long wavelength limit, the Landau levels induced by the inhomogeneous Dzyaloshinskii-Moriya interaction exhibit relativistic physics described by the Klein-Gordon equation. The spin Nernst response due to the formation of magnonic Landau levels is compared to similar topological responses in skyrmion and vortex-antivortex crystal phases of AFM insulators. Here, our studies show that AFM insulators exhibit rich physics associated with topological magnon excitations.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Nebraska, Lincoln, NE (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: SC0014189

OSTI ID:: 1755211

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 125; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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References (74)

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