Vortex line in spin-orbit coupled atomic Fermi gases

Abstract

It has recently been shown that the spin-orbit coupling gives rise to topologically-nontrivial and thermodynamically-stable gapless superfluid phases when the pseudo-spin populations of an atomic Fermi gas is imbalanced, with the possibility of featuring Majorana zero-energy quasiparticles. In this paper, we consider a Rashba-type spin-orbit coupling, and use the Bogoliubov-de Gennes formalism to analyze a single vortex line along a finite cylinder with a periodic boundary condition. We show that the signatures for the appearance of core- and edge-bound states can be directly found in the density of single-particle states and particle-current density. In particular, we find that the pseudo-spin components counterflow near the edge of the cylinder, the strength of which increases with increasing spin-orbit coupling.

7 pages with 6 figures; minor changes

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Cited by in corpus (16)

• Searching for Majorana Fermions in 2D Spin-orbit Coupled Fermi Superfluids at Finite Temperature
• Route to Observable Fulde-Ferrell-Larkin-Ovchinnikov Phases in 3D Spin-Orbit Coupled Degenerate Fermi Gases
• Spin-orbit coupling induced Fulde-Ferrell-Larkin-Ovchinnikov-like Cooper pairing and skyrmion-like polarization textures in trapped optical lattices
• Topological superfluid phases of an atomic Fermi gas with in- and out-of-plane Zeeman fields and equal Rashba-Dresselhaus spin-orbit coupling
• Tuning Rashba and Dresselhaus spin-orbit couplings: Effects on singlet and triplet condensation with Fermi atoms
• Short range asymptotic behavior of the wave-functions of interacting spin-half fermionic atoms with spin-orbit coupling: a model study
• Reentrant topological transitions with Majorana end states in 1D superconductors by lattice modulation
• Polarization of a quasi two-dimensional repulsive Fermi gas with Rashba spin-orbit coupling: a variational study
• Two-dimensional quasi-ideal Fermi gas with Rashba spin-orbit coupling
• Counterflow of spontaneous mass currents in trapped spin-orbit coupled Fermi gases
• Three-component topological superfluid in one-dimensional Fermi gases with spin-orbit coupling
• Majorana vortex modes in spin-singlet chiral superconductors with noncollinear spin ordering: Local density of states study
• Non-Abelian Majorana fermions in topological $s$-wave Fermi superfluids
• Critical temperature in the BCS-BEC crossover with spin-orbit coupling
• Dynamical spin properties of confined Fermi and Bose systems in presence of spin-orbit coupling
• Rabi coupled fermions in the BCS-BEC crossover