Magnon Chirality Hall Effect in Antiferromagnet

ORAL

Abstract

In a collinear antiferromagnet with easy-axis anisotropy, symmetry dictates that the spin wave modes must be doubly degenerate with opposite chirality. We show that in the presence of the Dzyaloshinskii-Moriya interaction, there exist a magnon chirality Hall effect, where magnons with opposite chirality flow to opposite transverse edges when an in-plane temperature gradient is applied. Possible material candidates to realize this effect is also discussed.

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Authors

  • Ran Cheng

    Carnegie Mellon University

  • Nikhil Sivadas

    Department of Physics, Carnegie Mellon University, Carnegie Mellon University

  • Satoshi Okamoto

    Oak Ridge National Laboratory, Materials Science and Technology Division, Oak Ridge National Laboratory

  • Di Xiao

    Department of Physics, Carnegie Mellon University, Carnegie Mellon University, Carnegie Mellon Univ