Related Experiment Video
Updated: Mar 11, 2026

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
Spin Nernst Effect of Magnons in Collinear Antiferromagnets
Ran Cheng1, Satoshi Okamoto2, Di Xiao1
1Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
Abstract:
In a collinear antiferromagnet with easy-axis anisotropy, symmetry guarantees that the spin wave modes are doubly degenerate. The two modes carry opposite spin angular momentum and exhibit opposite chirality. Using a honeycomb antiferromagnet in the presence of the Dzyaloshinskii-Moriya interaction, we show that a longitudinal temperature gradient can drive the two modes to opposite transverse directions, realizing a spin Nernst effect of magnons with vanishing thermal Hall current. We find that magnons around the Γ point and the K point contribute oppositely to the transverse spin transport, and their competition leads to a sign change of the spin Nernst coefficient at finite temperature. Possible material candidates are discussed.
More Related Videos
Related Concept Videos
Atomic Nuclei: Nuclear Spin State Overview
Diamagnetism
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
NMR Spectroscopy: Spin–Spin Coupling
Atomic Nuclei: Nuclear Magnetic Moment
Paramagnetism
Atomic Nuclei: Magnetic Resonance

