Generic Phase Diagram of Fermion Superfluids with Population Imbalance

Abstract

It is shown by microscopic calculations for trapped imbalanced Fermi superfluids that the gap function has always sign changes, i.e., the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state like, up to a critical imbalance $P_c$, beyond which normal state becomes stable, at temperature T=0. A phase diagram is constructed in $T$ vs $P$, where the BCS state without sign change is stable only at $T\ne 0$. We reproduce the observed bimodality in the density profile to identify its origin and evaluate $P_c$ as functions of $T$ and the coupling strength. These dependencies match with the recent experiments.

arXiv comment5 pages, 5 figures, replaced by the version to appear in PRL

References in corpus (27)

• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Pairing and Phase Separation in a Polarized Fermi Gas
• Fermionic Superfluidity with Imbalanced Spin Populations and the Quantum Phase Transition to the Normal State
• BCS-BEC Crossover: From High Temperature Superconductors to Ultracold Superfluids
• Inhomogeneous Superconductivity in Condensed Matter and QCD
• Interior Gap Superfluidity
• Heat Capacity of a Strongly-Interacting Fermi Gas
• Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
• BEC-BCS crossover in "magnetized" Feshbach-resonantly paired superfluids
• Phase separation in asymmetrical fermion superfluids
• Asymmetric Two-component Fermion Systems in Strong Coupling
• Spin 1/2 Fermions in the Unitary Regime: A Superfluid of a New Type
• Texture in the Superconducting Order Parameter of CeCoIn_5 Revealed by Nuclear Magnetic Resonance
• Direct Imaging of Spatially Modulated Superfluid Phases in Atomic Fermion Systems
• Superfluid stability in BEC-BCS crossover
• BCS Theory for Trapped Ultracold Fermions
• Strongly interacting Fermi gases with density imbalance
• Phase diagram of a cold polarized Fermi gas
• Mean field phase diagrams of imbalanced Fermi gases near a Feshbach resonance
• Induced P-wave Superfluidity in Asymmetric Fermi Gases
• Profiles of near-resonant population-imbalanced trapped Fermi gases
• Pairing in a two-component ultracold Fermi gas: phases with broken space symmetries
• Trapped Fermions across a Feshbach resonance with population imbalance
• Pairing of a trapped resonantly-interacting fermion mixture with unequal spin populations
• Non-standard pairing in asymmetric trapped Fermi gases
• Topological Structure of a Vortex in Fulde-Ferrell-Larkin-Ovchinnikov State
• Relation between Vortex core charge and Vortex Bound States

Cited by in corpus (91)

• Universal phase diagram of a strongly interacting Fermi gas with unbalanced spin populations
• Phase diagram of a two-component Fermi gas with resonant interactions
• Normal state of a polarized Fermi gas at unitarity
• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Fulde-Ferrell-Larkin-Ovchinnikov superfluidity in one-dimensional optical lattices
• Density-Matrix Renormalization Group Study of Trapped Imbalanced Fermi Condensates
• Fulde-Ferrell-Larkin-Ovchinnikov states in one-dimensional spin-polarized ultracold atomic Fermi gases
• Exact Numerical Study of Pair Formation with Imbalanced Fermion Populations
• Sarma Phase in Trapped Unbalanced Fermi Gases
• Finite temperature phase diagram of a polarized Fermi gas in an optical lattice
• Imbalanced Fermi Gases at Unitarity
• Vortex states in superconductors with strong Pauli-paramagnetic effect
• Zero Temperature Thermodynamics of Asymmetric Fermi Gases at Unitarity
• Larkin-Ovchinnikov state in resonant Fermi gas
• FFLO state in 1, 2, and 3 dimensional optical lattices combined with a non-uniform background potential
• Finite temperature phase diagram of a spin-polarized ultracold Fermi gas in a highly elongated harmonic trap
• Superfluidity at the BEC-BCS crossover in two-dimensional Fermi gases with population and mass imbalance
• Superfluid phase diagrams of trapped Fermi gases with population imbalance
• Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity
• Comparative Study of BCS-BEC Crossover Theories above $T_c$: the Nature of the Pseudogap in Ultra-Cold Atomic Fermi Gases
• Quantum phase diagram of fermion mixtures with population imbalance in one-dimensional optical lattices
• Pair correlations of a spin-imbalanced Fermi gas on two-leg ladders
• Phase Diagram of Cold Polarized Fermi Gas in Two Dimensions
• The role of interactions in spin-polarised atomic Fermi gases at unitarity
• Thermodynamics and superfluid density in BCS-BEC crossover with and without population imbalance
• Comparison of Different Pairing Fluctuation Approaches to BCS-BEC Crossover
• Cold Attractive Spin Polarized Fermi Lattice Gases and the Doped Positive U Hubbard Model
• Fulde-Ferrell states and Berezinskii-Kosterlitz-Thouless phase transition in two-dimensional imbalanced Fermi gases
• Finite Temperature Phase Diagram of a Two-Component Fermi Gas with Density Imbalance
• Vortex state in a Fulde-Ferrell-Larkin-Ovchinnikov superconductor based on the quasiclassical theory
• Stability conditions and phase diagrams for two component Fermi gases with population imbalance
• Enhancement effect of mass imbalance on Fulde-Ferrell-Larkin-Ovchinnikov type of pairing in Fermi-Fermi mixtures of ultracold quantum gases
• Breakdown of the local density approximation in interacting systems of cold fermions in strongly anisotropic traps
• Pairing in a two-dimensional Fermi gas with population imbalance
• Imbalanced Fermi superfluid in a one-dimensional optical potential
• Single-plane-wave Larkin-Ovchinnikov-Fulde-Ferrell state in BCS--Bose-Einstein condensation crossover
• Normal-Superfluid Interface Scattering For Polarized Fermion Gases
• Imbalanced Superfluid Phase of a Trapped Fermi Gas in the BCS-BEC Crossover Regime
• Pair formation and collapse in imbalanced Fermion populations with unequal masses
• Finite temperature QMC study of the one-dimensional polarized Fermi gas
• Angular Fulde-Ferrell-Larkin-Ovchinnikov state in cold fermion gases in a toroidal trap
• Theory of Superfluids with Population Imbalance: Finite Temperature and BCS-BEC Crossover Effects
• Vortex Core Structure in Neutral Fermion Superfluids with Population Imbalance
• Spin-polarized droplets in the unitary Fermi gas
• Instability of Fulde-Ferrell-Larkin-Ovchinnikov states in three and two dimensions
• Non-BCS superfluidity in trapped ultracold Fermi gases
• Fulde-Ferrell-Larkin-Ovchinnikov States in Two-Band Superconductors
• Feshbach resonances and weakly bound molecular states of boson-boson and boson-fermion NaK pairs
• Theory of the Normal/Superfluid interface in population imbalanced Fermi gases
• Finite temperature phase diagram of trapped Fermi gases with population imbalance
• Controlling the pair momentum of the FFLO state in a 3D Fermi gas through a 1D periodic potential
• Resonant enhancement of the FFLO-state in 3D by a one-dimensional optical potential
• Stable Sarma State in Two-band Fermi Systems
• Ground-state properties of the one-dimensional attractive Hubbard model with confinement: a comparative study
• Population imbalanced lattice fermions near the BCS-BEC crossover: II. The FFLO regime and its thermal signatures
• Population imbalanced lattice fermions near the BCS-BEC crossover: I.The breached pair and metastable FFLO phases
• Strong coupling s-wave superconductors in the extreme Pauli limit: I.The breached pair and metastable FFLO phases
• Critical behaviour in one dimension: unconventional pairing, phase separation, BEC-BCS crossover and magnetic Lifshitz transition
• Fulde-Ferrell Superfluids without Spin Imbalance in Driven Optical Lattices
• Imbalanced d-wave superfluids in the BCS-BEC crossover regime at finite temperatures
• Radio Frequency Spectroscopy of Trapped Fermi Gases with Population Imbalance
• FFLO Vortex Lattice States in Cold Fermionic-Atom Systems
• Critical endpoint and universality class of neutron ${}^3{P}_2$ superfluids in neutron stars
• Field Evolution of the Fulde-Ferrell-Larkin-Ovchinnikov State in a Superconductor with Strong Pauli Effects
• Rotating Fulde-Ferrell-Larkin-Ovchinnikov state in cold Fermi gases
• Spin-Imbalanced Fermi Superfluidity in a Lieb Lattice Hubbard Model
• Dimensional Crossover in a Spin-imbalanced Fermi gas
• Higgs instability in gapless superfluidity/superconductivity
• Larkin-Ovchinnikov phases in two-dimensional square lattices
• Radial Fulde-Ferrell-Larkin-Ovchinnikov state in a population-imbalanced Fermi gas
• Pure Fulde-Ferrell-Larkin-Ovchinnikov state in optical lattices
• Magnetic field-induced quasiparticle excitation in Nb3Sn: Evidence for anisotropic s-wave pairing
• Temperature Effects in a Fermi Gas with Population Imbalance
• Feasibility of a Fulde-Ferrell-Larkin-Ovchinnikov superfluid Fermi atomic gas
• Phase separations induced by a trapping potential in one-dimensional fermionic systems as a source of core-shell structures
• Magnetization profile and core level spectroscopy in a multiply quantized vortex of imbalanced Fermi superfluids
• Asymmetric Fermion Superfluid with Inter- and Intra-Species Pairings
• Multiple-quantized vortices in rotating LOFF state of ultracold Fermi superfluid gas
• Microscopic Eilenberger theory of Fulde-Ferrell-Larkin-Ovchinnikov states in the presence of vortices
• Conductance spectroscopy of a correlated superconductor in a magnetic field in the Pauli limit: Evidence for strong correlations
• Unconventional pairing in few-fermion systems at finite temperature
• Asymmetric Fermi Superfluid With Two Types Of Pairings
• Andreev reflection between a normal metal and the FFLO superconductor II: a self-consistent approach
• Do phase fluctuations influence the Fulde-Ferrell-Larkin-Ovchinnikov state in a 3D Fermi gas?
• Collective excitations of an imbalanced fermion gas in a 1D optical lattice
• Imbalanced superfluid state in an annular disk
• Density and Spin Linear Response of Atomic Fermi Superfluids with Population Imbalance in BCS-BEC Crossover
• Pairing in population imbalanced Fermion systems
• Trap and population imbalanced two-component Fermi gas in the BEC limit
• Competing order parameters and a tricritical point with a difference
• Flow and critical velocity of an imbalanced Fermi gas through an optical potential