Normal state properties of spin-orbit coupled Fermi gases in the upper branch of energy spectrum

Abstract

We investigate normal state properties of spin-orbit coupled Fermi gases with repulsive s-wave interaction, in the absence of molecule formation, i.e., in the so-called "upper branch". Within the framework of random phase approximation, we derive analytical expressions for the quasi-particle lifetime ${\tau }_s$, the effective mass $m_s^{\ast }$, and the Green's function renormalization factor $Z_s$ in the presence of Rashba spin-orbit coupling. In contrast to spin-orbit coupled electron gas with Coulomb interaction, we show that the modifications are dependent on the Rashba band index s, and occur in the first order of the spin-orbit coupling strength. We also calculate experimental observable such as spectral weight, density of state and specific heat, which exhibit significant differences from their counterparts without spin-orbit coupling. We expect our microscopic calculations of these Fermi liquid parameters would have the immediate applications to the spin-orbit coupled Fermi gases in the upper branch of the energy spectrum.

References in corpus (11)

• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• A Bose-Einstein Condensate in a Uniform Light-induced Vector Potential
• Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms
• Pairing without Superfluidity: The Ground State of an Imbalanced Fermi Mixture
• BCS-BEC crossover induced by a synthetic non-Abelian gauge field
• Scattering Length Scaling Laws for Ultracold Three-Body Collisions
• Chiral Rashba spin textures in ultra-cold Fermi gases
• Radio frequency spectroscopy of a strongly imbalanced Feshbach-resonant Fermi gas
• Topological superfluids on a lattice with non-Abelian gauge fields
• Radio-frequency spectroscopy of weakly bound molecules in spin-orbit coupled atomic Fermi gases

Cited by in corpus (3)

• Spin-orbit coupling induced Fulde-Ferrell-Larkin-Ovchinnikov-like Cooper pairing and skyrmion-like polarization textures in trapped optical lattices
• Theory of a chiral Fermi liquid: general formalism
• Collective modes of spin-orbit coupled Fermi gases in the repulsive regime