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.

*Work at CMU is supported by the Department of Energy, Basic Energy Sciences, Grant No. DE-SC0012509. S.O. acknowledges support by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences, and Engineering Division. D.X. also acknowledges support from a Research Corporation for Science Advancement Cottrell Scholar Award.

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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