Odd-parity superconductivity in the vicinity of inversion symmetry breaking in spin-orbit-coupled systems

TL;DR

This paper explores how spin-orbit coupling and inversion symmetry breaking can induce odd-parity superconductivity, especially under a Zeeman field, offering a new pathway to topological superconductivity.

Contribution

It introduces a mechanism where parity-breaking fluctuations lead to odd-parity pairing in spin-orbit-coupled systems, modulated by external magnetic fields.

Findings

Spin-orbit coupling induces attractive interactions in odd-parity channels.

Zeeman field suppresses s-wave pairing, favoring odd-parity states.

Proposes a new route to realize topological superconductivity.

Abstract

We study superconductivity in spin-orbit-coupled systems in the vicinity of inversion symmetry breaking. We find that due to the presence of spin-orbit coupling, fluctuations of the incipient parity-breaking order generate an attractive pairing interaction in an odd-parity pairing channel, which competes with the s-wave pairing. We show that applying a Zeeman field suppresses the s-wave pairing and promotes the odd-parity superconducting state. Our work provides a new mechanism for odd-parity pairing and opens a route to novel topological superconductivity.