Anisotropic Superfluidity in the Two-Species Polar Fermi Gas

Abstract

We study the superfluid pairing in a two-species gas of heteronuclear fermionic molecules with equal density. The interplay of the isotropic s-wave interaction and anisotropic long-range dipolar interaction reveals rich physics. We find that the single-particle momentum distribution has a characteristic ellipsoidal shape that can be reasonably represented by a deformation parameter $\alpha$ defined similarly to the normal phase. Interesting momentum-dependent features of the order parameter are identified. We calculate the critical temperatures of both the singlet and triplet superfluid, suggesting a possible pairing symmetry transition by tuning the s-wave or dipolar interaction strength.

arXiv comment4 pages, 5 figures

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Cited by in corpus (10)

• Tuning between singlet, triplet, and mixed pairing states in an extended Hubbard chain
• Fermion Pairing across a Dipolar Interaction Induced Resonance
• Singlet and Triplet Superfluid Competition in a Mixture of Two-Component Fermi and One-Component Dipolar Bose Gases
• Physical dipoles and second order perturbation theory for dipolar fermions in two dimensions
• Second-order interaction corrections to the Fermi surface and the quasiparticle properties of dipolar fermions in three dimensions
• Self-consistent field theory of polarized BEC: dispersion of collective excitation
• A local exchange theory for trapped dipolar gases
• Effect of short-range interaction for collision of ultracold dipoles
• Superfluid pairing in a mixture of a spin-polarized Fermi gas and a dipolar condensate
• Thermal-assisted Anisotropy and Thermal-driven Instability in the Superfluidity state of Two-Species Polar Fermi Gas