Spin-orbit coupling induced enhancement of superconductivity in a two-dimensional repulsive gas of fermions
We study a model of a two-dimensional repulsive Fermi gas with Rashba spin-orbit coupling $\alpha_R$, and investigate the superconducting instability using renormalization group approach. We find that in general superconductivity is enhanced as the dimensionless ratio 1/2m\alpha_R^2/E_F$ increases, resulting in unconventional superconducting states which break time reversal symmetry.