Intrinsic Magnetoconductivity of Non-magnetic Metals

TL;DR

This paper investigates the intrinsic magnetoconductivity in non-magnetic metals, revealing a new band-structure-dependent contribution that can cause positive magnetoconductivity even without chiral anomaly effects.

Contribution

It introduces a novel intrinsic magnetoconductivity term in non-magnetic metals, independent of relaxation time, challenging traditional understanding and Kohler's rule.

Findings

Identifies a new intrinsic magnetoconductivity contribution

Shows this contribution can be positive in longitudinal magnetic fields

Demonstrates violation of Kohler's rule in these metals

Abstract

We present a comprehensive study of magnetoconductivity for general three-dimensional non-magnetic metals within the Berry-curvature-corrected semiclassical and Boltzmann framework. We find a new contribution, which is intrinsic in the sense that its ratio to the zero-magnetic-field conductivity is fully determined by the intrinsic band properties, independent of the transport relaxation time, showing a clear violation of Kohler's rule. Remarkably, this contribution can generally be positive for the longitudinal configuration, providing a new mechanism for the appearance of positive magnetoconductivity under longitudinal configuration besides the chiral anomaly effect.