Torsional chiral magnetic effect in Weyl semimetal with topological defect

TL;DR

This paper predicts a torsional chiral magnetic effect in Weyl semimetals caused by lattice dislocations, which induces measurable charge currents and differs from the conventional effect that vanishes in real materials.

Contribution

It introduces a realistic lattice model demonstrating the torsional chiral magnetic effect, suggesting experimental detection methods.

Findings

Torsional dislocations induce charge currents in Weyl semimetals.

The effect persists in realistic lattice models, unlike the conventional chiral magnetic effect.

Potential for experimental observation via SQUID or nonlocal resistivity measurements.

Abstract

We propose a torsional response raised by lattice dislocation in Weyl semimetals akin to chiral magnetic effect; i.e. a fictitious magnetic field arising from screw or edge dislocation induces charge current. We demonstrate that, in sharp contrast to the usual chiral magnetic effect which vanishes in real solid state materials, the torsional chiral magnetic effect exists even for realistic lattice models, which implies the experimental detection of the effect via SQUID or nonlocal resistivity measurements in Weyl semimetal materials.