Normal-Superfluid Interface Scattering For Polarized Fermion Gases

Abstract

We argue that, for the recent experiments with imbalanced fermion gases, a temperature difference may occur between the normal (N) and the gapped superfluid (SF) phase. Using the mean-field formalism, we study particle scattering off the N-SF interface from the deep BCS to the unitary regime. We show that the thermal conductivity across the interface drops exponentially fast with increasing $h/k_{B}T$, where $h$ is the chemical potential imbalance. This implies a blocking of thermal equilibration between the N and the SF phase. We also provide a possible mechanism for the creation of gap oscillations (FFLO-like states) as seen in recent studies on these systems.

4 pages, 3 figures

References in corpus (16)

• Random-Matrix Theory of Quantum Transport
• 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
• 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
• Deformation of a Trapped Fermi Gas with Unequal Spin Populations
• Finite temperature phase diagram of a polarised Fermi condensate
• Strongly interacting Fermi gases with density imbalance
• Generic Phase Diagram of Fermion Superfluids with Population Imbalance
• Sarma Phase in Trapped Unbalanced Fermi Gases
• Surface Tension in Unitary Fermi Gases with Population Imbalance
• Pairing of a trapped resonantly-interacting fermion mixture with unequal spin populations
• Non-standard pairing in asymmetric trapped Fermi gases
• Breakdown of the local density approximation in interacting systems of cold fermions in strongly anisotropic traps

Cited by in corpus (22)

• Density-Matrix Renormalization Group Study of Trapped Imbalanced Fermi Condensates
• Interface Tension of Bose-Einstein Condensates
• Imbalanced Fermi Gases at Unitarity
• Spin Transport in Polaronic and Superfluid Fermi Gases
• Subwavelength-width optical tunnel junctions for ultracold atoms
• Andreev reflection in bosonic condensates
• Evaporative depolarization and spin transport in a unitary trapped Fermi gas
• Spin-polarized droplets in the unitary Fermi gas
• Metastability in Spin-Polarized Fermi Gases
• Non-BCS superfluidity in trapped ultracold Fermi gases
• Phase separation in imbalanced fermion superfluids beyond mean-field
• Collective Excitations of Trapped Imbalanced Fermion Gases
• Trapped Phase-Segregated Bose-Fermi Mixtures and their Collective Excitations
• Normal-Superfluid Interface for Polarized Fermion Gases
• Spin Andreev-like reflection in metal-Mott insulator heterostructures
• Discrete time-crystals in unbounded potentials
• Transport of Spin and Mass at Normal-Superfluid Interfaces in the Unitary Fermi Gas
• Linear response of heat conductivity of normal-superfluid interface of a polarized Fermi gas to orbital magnetic field
• Dependence of interface conductivity on relevant physical parameters in polarized Fermi mixtures
• Scattering Resonances in a Degenerate Fermi Gas
• Collective Excitations of Harmonically Trapped Ideal Gases
• Interface potential and line tension for Bose-Einstein condensate mixtures near a hard wall