Superconductivity in a two-dimensional repulsive Rashba gas at low electron density

Abstract

We study the superconducting instability and the resulting superconducting states in a twodimensional repulsive Fermi gas with Rashba spin-orbit coupling at low electron density (namely the Fermi energy E F is lower than the energy E R of the Dirac point induced by Rashba coupling). We find that superconductivity is enhanced as the dimensionless Fermi energy  F ( º E E