Nonlinear Hall effect in Weyl semimetals induced by chiral anomaly

Abstract

We predict a nonlinear Hall effect in certain Weyl semimetals with broken inversion symmetry. When the energy dispersions about pairs of Weyl nodes are skewed -- the Weyl cones are "tilted" -- the concerted actions of the anomalous velocity and the chiral anomaly give rise to the nonlinear Hall effect. This Hall conductivity is linear in both electric and magnetic fields, and depends critically on the tilting of the Weyl cones. We also show that this effect does not rely on a finite Berry curvature dipole, in contrast to the intrinsic quantum nonlinear Hall effect that was recently observed in type-II Weyl semimetals.

arXiv commentv2: 12 pages, 4 figures; version accepted for publication in PRB

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• Nonlinear Hall Effects induced by Berry Curvature Dipole in CuPb${}_9$(PO${}_4$)${}_6$O
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