Nonlinear phonon Hall effects in ferroelectrics: its existence and
non-volatile electrical control
- URL: http://arxiv.org/abs/2306.08177v1
- Date: Tue, 13 Jun 2023 23:51:13 GMT
- Title: Nonlinear phonon Hall effects in ferroelectrics: its existence and
non-volatile electrical control
- Authors: W. Luo, J. Y. Ji, P. Chen, Y. Xu, L. F. Zhang, H. J. Xiang and L.
Bellaiche
- Abstract summary: We show that a non-volatile electric-field control of heat current can be realized in ferroelectrics through the nonlinear phonon Hall effects.
Our work provides a route for electric-field control of thermal Hall current in ferroelectrics.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Nonlinear Hall effects have been previously investigated in
non-centrosymmetric systems for electronic systems. However, they only exist in
metallic systems and are not compatible with ferroelectrics since these latter
are insulators, hence limiting their applications. On the other hand,
ferroelectrics naturally break inversion symmetry and can induce a non-zero
Berry curvature. Here, we show that a non-volatile electric-field control of
heat current can be realized in ferroelectrics through the nonlinear phonon
Hall effects. More precisely, based on Boltzmann equation under the
relaxation-time approximation, we derive the equation for nonlinear phonon Hall
effects, and further show that the behaviors of nonlinear phonon (Boson) Hall
effects are very different from nonlinear Hall effects for electrons (Fermion).
Our work provides a route for electric-field control of thermal Hall current in
ferroelectrics.
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