Asymmetric Fermi Superfluid With Two Types Of Pairings

TL;DR

This paper explores the phase diagram of an asymmetric fermion superfluid with two types of pairing, showing how single-species pairing stabilizes the system and cures magnetic instability at low temperatures.

Contribution

It introduces a detailed analysis of the phase diagram for asymmetric fermion superfluids with double- and single-species pairings, revealing the stabilizing effect of single-species pairing.

Findings

Single-species pairing cures magnetic instability.

No mixing occurs between the two pairing types at fixed chemical potential.

Phase diagram mapped in temperature and chemical potential mismatch.

Abstract

We investigate the phase diagram in the plane of temperature and chemical potential mismatch for an asymmetric fermion superfluid with double- and single-species pairings. There is no mixing of these two types of pairings at fixed chemical potential, but the introduction of the single species pairing cures the magnetic instability at low temperature.