Scattering theory of the chiral magnetic effect in a Weyl semimetal: Interplay of bulk Weyl cones and surface Fermi arcs release_rev_701891ee-0bc8-426a-9e20-19b674e7e659

by P. Baireuther, J. A. Hutasoit, J. Tworzydło, C. W. J. Beenakker

Released as a article .

2016  

Abstract

We formulate a linear response theory of the chiral magnetic effect in a finite Weyl semimetal, expressing the electrical current density j induced by a slowly oscillating magnetic field B or chiral chemical potential μ in terms of the scattering matrix of Weyl fermions at the Fermi level. Surface conduction can be neglected in the infinite-system limit for δ j/δμ, but not for δ j/δ B: The chirally circulating surface Fermi arcs give a comparable contribution to the bulk Weyl cones no matter how large the system is, because their smaller number is compensated by an increased flux sensitivity. The Fermi arc contribution to μ^-1δ j/δ B has the universal value (e/h)^2, protected by chirality against impurity scattering --- unlike the bulk contribution of opposite sign.
In text/plain format

Type  article
Stage   accepted
Date   2016-03-30
Version   v3
Language   en ?
arXiv  1512.02144v3
Work Entity
access all versions, variants, and formats of this works (eg, pre-prints)
Revision

This is a specific, static metadata record, not necessarily linked to any current entity in the catalog.

Catalog Record
Revision: 701891ee-0bc8-426a-9e20-19b674e7e659
API URL: JSON