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arXiv · 2109.12117

Large extrinsic phonon thermal Hall effect from resonant scattering

Xiao-Qi Sun·Jing-Yuan Chen·Steven A. Kivelson
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Abstract

Recent experimental observations of unexpectedly large thermal Hall conductivities, $\kappa_H$, in insulating materials, including the parent compounds of the high temperature superconducting cuprates, likely reflect an extrinsic contribution from a yet to be identified extrinsic source of skew scattering of acoustic phonons. We show that resonant scattering of phonons from a certain class of three-level systems produces strong skew scattering in the presence of a modest magnetic field. We interpret this as a first step towards understanding the experiments.

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Xiao-Qi Sun, Jing-Yuan Chen, Steven A. Kivelson. 2021-09-24. Large extrinsic phonon thermal Hall effect from resonant scattering. https://doi.org/10.1103/physrevb.106.144111

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