Magnon Landau Levels and Spin Responses in Antiferromagnets
Mesoscale and Nanoscale Physics
2021-01-04 v2 Materials Science
Abstract
We study gauge fields produced by gradients of the Dzyaloshinskii-Moriya interaction and propose a model of 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.
Keywords
Cite
@article{arxiv.2006.12423,
title = {Magnon Landau Levels and Spin Responses in Antiferromagnets},
author = {Bo Li and Alexey A. Kovalev},
journal= {arXiv preprint arXiv:2006.12423},
year = {2021}
}
Comments
6 pages, 4 figures