title: Tuning the tricritical point with spin-orbit coupling in polarized fermionic condensates.
abstract: We investigate a two-component atomic Fermi gas with population imbalance in the presence of Rashba-type spin-orbit coupling (SOC). As a competition between SOC and population imbalance, the finite-temperature phase diagram reveals a large variety of new features, including the expanding of the superfluid state regime and the shrinking of both the phase separation and the normal regimes. For sufficiently strong SOC, the phase separation region disappears, giving way to the superfluid state. We find that the tricritical point moves toward a regime of low temperature, high magnetic field, and high polarization as the SOC increases.
authors.affiliation: National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Renyuan
authors.initials: R
authors.lastname: Liao
authors.forename: Yi-Xiang
authors.initials: YX
authors.lastname: Yu
authors.forename: Wu-Ming
authors.initials: WM
authors.lastname: Liu