Magnetotransport in Dirac metals: chiral magnetic effect and quantum oscillations

TL;DR

This paper investigates magnetotransport phenomena in Dirac metals, focusing on the chiral magnetic effect and quantum oscillations, using chiral kinetic theory to connect theoretical predictions with experimental observations in materials like Cd3As2.

Contribution

It introduces a unified theoretical framework employing chiral kinetic theory to analyze both negative magnetoresistance and quantum oscillations in Dirac metals.

Findings

Chiral magnetic effect causes negative magnetoresistance in Dirac metals.

Quantum oscillations are explained by the Fermi surface properties.

Results are relevant to recent experiments on Cd3As2.

Abstract

Dirac metals are characterized by the linear dispersion of fermionic quasi-particles, with the Dirac point hidden inside a Fermi surface. We study the magnetotransport in these materials using chiral kinetic theory to describe within the same framework both the negative magnetoresistance caused by chiral magnetic effect and quantum oscillations in the magnetoresistance due to the existence of the Fermi surface. We discuss the relevance of obtained results to recent measurements on ${\rm Cd_3As_2}$.