Non-linear Hall effect in three-dimensional Weyl and Dirac semimetals
Abstract
We experimentally investigate a non-linear Hall effect for three-dimensional WTe and CdAs single crystals, representing Weyl and Dirac semimetals, respectively. We observe finite second-harmonic Hall voltage, which depends quadratically on the longitudinal current in zero magnetic field. Despite this observation well corresponds to the theoretical predictions, only magnetic field dependence allows to distinguish the non-linear Hall effect from a thermoelectric response. We demonstrate that second-harmonic Hall voltage shows odd-type dependence on the direction of the magnetic field, which is a strong argument in favor of current-magnetization effects. In contrast, one order of magnitude higher thermopower signal is independent of the magnetic field direction.
Cite
@article{arxiv.1902.02699,
title = {Non-linear Hall effect in three-dimensional Weyl and Dirac semimetals},
author = {O. O. Shvetsov and V. D. Esin and A. V. Timonina and N. N. Kolesnikov and E. V. Deviatov},
journal= {arXiv preprint arXiv:1902.02699},
year = {2019}
}
Comments
minor text correction