The Pairing of Spin-orbit Coupled Fermi Gas in Optical Lattice

摘要

We investigate Rashba spin-orbit coupled Fermi gases in square opticallattice by using the determinant quantum Monte Carlo (DQMC) simulations whichis free of the sign-problem. We show that the Berezinskii-Kosterlitz-Thoulesphase transition temperature is firstly enhanced and then suppressed byspin-orbit coupling in the strong attraction region. In the intermediateattraction region, spin-orbit coupling always suppresses the transitiontemperature. We also show that the spin susceptibility becomes anisotropic andretains finite values at zero temperature.