title: Spin-orbit coupled Fermi gases across a Feshbach resonance.
abstract: In this Letter we study both ground state properties and the superfluid transition temperature of a spin-1/2 Fermi gas across a Feshbach resonance with a synthetic spin-orbit coupling, using the mean-field theory and the exact solution of two-body problem. We show that a strong spin-orbit coupling can significantly enhance the pairing gap for negative scattering length a(s), due to increased density of state at Fermi surface. Strong spin-orbit coupling can also significantly enhance the superfluid transition temperature Tc to a sizable fraction of Fermi temperature when a(s) ≤ 0, while it suppresses Tc slightly for positive a(s). The interaction energy and pair size at resonance are also discussed.
authors.affiliation: Institute for Advanced Study, Tsinghua University, Beijing 100084, China. zqyu.physics@gmail.com
authors.forename: Zeng-Qiang
authors.initials: ZQ
authors.lastname: Yu
authors.forename: Hui
authors.initials: H
authors.lastname: Zhai