Magnon Landau Levels and Spin Responses in Antiferromagnets

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 b...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2020-12, Vol.125 (25), p.257201-257201, Article 257201
Main Authors: Li, Bo, Kovalev, Alexey A
Format: Article
Language:English
Subjects:
Antiferromagnetism
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Hall effect
Hypothetical particles
Klein-Gordon equation
Magnetic texture
Magnons
Particle theory
Spintronics
Topological insulators
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. Our studies show that AFM insulators exhibit rich physics associated with topological magnon excitations.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.125.257201