Chiral feedback for p-wave superconductors

Abstract

In a quasi-two-dimensional $ p $-wave superconductor there find six Cooper pairing states which are degenerate within the weak-coupling approach. We show that this degeneracy can be lifted by feedback effect favoring the so-called chiral $ p $-wave state. This effect is based on the anomalous coupling between charge and current in a system with broken time reversal symmetry and parity.