Fulde-Ferrell superfluidity in ultracold Fermi gases with Rashba spin-orbit coupling

Abstract

We theoretically investigate the inhomogeneous Fulde-Ferrell (FF) superfluidity in a three dimensional atomic Fermi gas with Rashba spin-orbit coupling near a broad Feshbach resonance. We show that within mean-field theory the FF superfluid state is always more favorable than the standard Bardeen-Cooper-Schrieffer (BCS) superfluid state when an in-plane Zeeman field is applied. We present a qualitative finite-temperature phase diagram near resonance and argue that the predicted FF superfluid is observable with experimentally attainable temperatures (i.e., $T\sim 0.2T_F$, where $T_F$ is the characteristic Fermi degenerate temperature).

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References in corpus (24)

• Many-Body Physics with Ultracold Gases
• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Phase diagram of a strongly interacting polarized Fermi gas in one dimension
• Equation of state of a superfluid Fermi gas in the BCS-BEC crossover
• Theory of 2D superconductor with broken inversion symmetry
• BCS-BEC crossover induced by a synthetic non-Abelian gauge field
• Mean field phase diagrams of imbalanced Fermi gases near a Feshbach resonance
• A Unitary Fermi Supersolid: The Larkin-Ovchinnikov Phase
• Phase Transitions and Pairing Signature in Strongly Attractive Fermi Atomic Gases
• Chiral Rashba spin textures in ultra-cold Fermi gases
• Unconventional superfluid in a two-dimensional Fermi gas with anisotropic spin-orbit coupling and Zeeman fields
• Imbalanced Fermi Gases at Unitarity
• Route to Observable Fulde-Ferrell-Larkin-Ovchinnikov Phases in 3D Spin-Orbit Coupled Degenerate Fermi Gases
• Larkin-Ovchinnikov state in resonant Fermi gas
• BCS-BEC crossover in an asymmetric two-component Fermi gas
• Comparative study of strong coupling theories of a trapped Fermi gas at unitarity
• Finite temperature phase diagram of a spin-polarized ultracold Fermi gas in a highly elongated harmonic trap
• Finite-Momentum Dimer Bound State in Spin-Orbit Coupled Fermi Gas
• Fulde-Ferrell Pairing instability in Spin-Orbit Coupled Fermi Gas
• Inhomogeneous Fulde-Ferrell superfluidity in spin-orbit coupled atomic Fermi gases
• Topological superfluids on a lattice with non-Abelian gauge fields
• Exotic pairing states in a Fermi gas with three-dimensional spin-orbit coupling
• Flow enhanced pairing and other novel effects in Fermi gases in synthetic gauge fields
• Radio-frequency spectroscopy of weakly bound molecules in spin-orbit coupled atomic Fermi gases

Cited by in corpus (16)

• Degenerate Quantum Gases with Spin-Orbit Coupling
• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Anisotropic Weyl Fermions from Quasiparticle Excitation Spectrum of a 3D Fulde-Ferrell Superfluid
• Competing superfluid orders in spin-orbit coupled fermionic cold atom optical lattices
• Berezinskii-Kosterlitz-Thouless Phase Transition in 2D Spin-Orbit Coupled Fulde-Ferrell Superfluids
• Enhancement effect of mass imbalance on Fulde-Ferrell-Larkin-Ovchinnikov type of pairing in Fermi-Fermi mixtures of ultracold quantum gases
• Topological Fulde-Ferrell Superfluids of a Spin-Orbit Coupled Fermi Gas
• Gapless topological Fulde-Ferrell superfluidity induced by in-plane Zeeman field
• Realizing Fulde-Ferrell Superfluids via a Dark-State Control of Feshbach Resonances
• Spin-orbit-coupled topological Fulde-Ferrell states of fermions in a harmonic trap
• Fulde-Ferrell States in Inverse Proximity Coupled Magnetically-Doped Topological Heterostructures
• Thermodynamic Properties of Rashba Spin-Orbit-Coupled Fermi Gas
• Cavity-induced Fulde-Ferrell-Larkin-Ovchinnikov superfluids of ultracold Fermi gases
• Phase diagram, band structure and density of states in two-dimensional attractive Fermi-Hubbard model with Rashba spin-orbit coupling
• Majorana Fermions in Semiconducting Nanowires on the Top of Fulde-Ferrell Superconductor
• Novel dynamical excitations and roton-based measurement of Cooper-pair momentum in a two-dimensional Fulde-Ferrell-Larkin-Ovchinnikov superfluid on optical lattices