Giant magnetoconductivity in non-centrosymmetric superconductors

TL;DR

This paper reveals a new mechanism in non-centrosymmetric superconductors where spin-orbit interaction and broken inversion symmetry cause a giant magnetoconductivity under in-plane magnetic fields, significantly affecting microwave absorption.

Contribution

It introduces a novel physical mechanism for giant magnetoconductivity in non-centrosymmetric superconducting films caused by spin-orbit interaction and inversion symmetry breaking.

Findings

Magnetoconductivity depends strongly on the angle between electric and magnetic fields.

The effect is proportional to the inelastic relaxation time of quasiparticles.

This mechanism can lead to much larger conductivity than conventional models.

Abstract

We discuss a novel physical mechanism which gives rise to a giant magnetoconductivity in non-centrosymmetric superconducting films. This mechanism is caused by a combination of spin-orbit interaction and inversion symmetry breaking in the system, and arises in the presence of an in-plane magnetic field ${\bf H}_\|$. It produces a contribution to the conductivity, which displays a strong dependence on the angle between the electric field ${\bf E}$ and ${\bf H}_\|$, and is proportional to the inelastic relaxation time of quasiparticles. Since in typical situations the latter is much larger than the elastic one this contribution can be much larger than the conventional conductivity thus leading to giant microwave absorption.