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arXiv · 2205.06293

Electric and chiral response to a pseudoelectric field in Weyl materials

A. A. Herasymchuk·P. O. Sukhachov·E. V. Gorbar
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Abstract

The electric and chiral current response to the time- and coordinate-dependent pseudoelectric field $\mathbf{E}_5$ in Weyl semimetals is studied. It is found that $\mathbf{E}_5$ leads to an electric current in the direction perpendicular to the field and the wave vector of the field-inducing perturbation. We dubbed this phenomenon the anomalous pseudo-Hall effect. The response of the chiral or valley current to the pseudoelectric field is also found to be nontrivial. Since the wave vector for $\mathbf{E}_5$ cannot be neglected, the frequency profile of the chiral conductivity is drastically different from its electric counterpart showing a step-like feature instead of a smooth Drude peak. The proposed effects can be investigated by driving sound waves in Weyl semimetals with broken time-reversal symmetry.

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A. A. Herasymchuk, P. O. Sukhachov, E. V. Gorbar. 2022-07-23. Electric and chiral response to a pseudoelectric field in Weyl materials. https://doi.org/10.1103/physrevb.106.045132

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