Thermal Hall effect from Magnon-Phonon Couplings

ORAL

Abstract

In this letter, we propose a new mechanism to realize the thermal Hall effect from magnon-phonon couplings in exchange spin wave systems. We study a collinear ferromagnetic system on the 2D square lattice with an in-plane Dzyaloshinskii-Moriya interaction, where neither the magnon system nor the phonon system alone shows the thermal Hall effect. However, the magnon-phonon interaction can lead to a thermal Hall effect of a hybrid magnon-phonon system. Such an interaction can be directly tuned by an out-plane gate voltage.

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Presenters

  • Xiaoou Zhang

    Carnegie Mellon University

Authors

  • Xiaoou Zhang

    Carnegie Mellon University

  • Yinhan Zhang

    Carnegie Mellon University

  • Satoshi Okamoto

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

  • Di Xiao

    Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA, Carnegie Mellon University, Carnegie Mellon Univ, Department of Physics, Carnegie Mellon University