Negative thermal magnetoresistivity as a signature of chiral anomaly in Weyl superconductors

TL;DR

This paper predicts that chiral anomaly in Weyl superconductors causes negative thermal magnetoresistivity due to emergent magnetic fields from vortex textures or strain, with a distinctive temperature dependence as a signature.

Contribution

It introduces a novel mechanism linking chiral anomaly to thermal transport in Weyl superconductors, supported by theoretical analysis combining Berry curvature and quasi-classical theory.

Findings

Chiral anomaly induces negative thermal magnetoresistivity.

Emergent magnetic fields from vortices or strain are key to this effect.

Characteristic temperature dependence serves as a signature.

Abstract

We propose that chiral anomaly of Weyl superconductors gives rise to negative thermal magnetoresistivity induced by emergent magnetic fields, which are generated by vortex textures of order parameters or lattice strain. We establish this scenario by combining the argument based on Berry curvatures, and the quasi-classical theory of the Eilenberger equation with quantum corrections arising from inhomogeneous structures. It is found that the chiral anomaly contribution of the thermal conductivity exhibits characteristic temperature dependence, which can be a smoking-gun signature of this effect.