Infinite Berry Curvature of Weyl Fermi Arcs

Dennis Wawrzik, Jhih Shih You, Jorge I. Facio, Jeroen Van Den Brink, Inti Sodemann

Research output: Contribution to journalArticlepeer-review

Abstract

We show that Weyl Fermi arcs are generically accompanied by a divergence of the surface Berry curvature scaling as 1/k2, where k is the distance to a hot line in the surface Brillouin zone that connects the projection of Weyl nodes with opposite chirality, but which is distinct from the Fermi arc itself. Such surface Berry curvature appears whenever the bulk Weyl dispersion has a velocity tilt toward the surface of interest. This divergence is reflected in a variety of Berry curvature mediated effects that are readily accessible experimentally and, in particular, leads to a surface Berry curvature dipole that grows linearly with the thickness of a slab of a Weyl semimetal material in the limit of the long lifetime of surface states. This implies the emergence of a gigantic contribution to the nonlinear Hall effect in such devices.

Original languageEnglish
Article number056601
JournalPhysical Review Letters
Volume127
Issue number5
DOIs
Publication statusPublished - 2021 Jul 30

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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