Unconventional Fulde-Ferrell-Larkin-Ovchinnikov pairing states in a Fermi gas with spin-orbit coupling

Abstract

We study the phase diagram in a two-dimensional Fermi gas with the synthetic spin-orbit coupling that has recently been realized experimentally. In particular, we characterize in detail the properties and the stability region of the unconventional Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states in such a system, which are induced by spin-orbit coupling and Fermi surface asymmetry. We identify several distinct nodal FFLO states by studying the topology of their respective gapless contours in momentum space. We then examine the phase structure and the number density distributions in a typical harmonic trapping potential under the local density approximation. Our studies provide detailed information on the FFLO pairing states with spin-orbit coupling and Fermi surface asymmetry, and will facilitate experimental detection of these interesting pairing states in the future.

7 pages, 6 figures

References in corpus (13)

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Cited by in corpus (13)

• Topological Fulde-Ferrel-Larkin-Ovchinnikov states in Spin-orbit Coupled Fermi Gases
• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Pair-Density-Wave Superconducting States and Electronic Liquid Crystal Phases
• Pairing Superfluidity in Spin-Orbit Coupled Ultracold Fermi Gases
• Topological quantum phase transitions and edge states in spin-orbital coupled Fermi gases
• Thermodynamic Properties of Rashba Spin-Orbit-Coupled Fermi Gas
• Superfluid weight and Berezinskii-Kosterlitz-Thouless temperature of spin-imbalanced and spin-orbit-coupled Fulde-Ferrell phases in lattice systems
• BCS-BEC crossover and quantum phase transition in an ultracold Fermi gas under spin-orbit coupling
• Weyl spin-orbit-coupling-induced interactions in uniform and trapped atomic quantum fluids
• Critical temperature in the BCS-BEC crossover with spin-orbit coupling
• Temperature tuned Fermi surface topology and segmentation in non-centrosymmetric superconductors
• SU(2) Ginzburg-Landau theory for degenerate Fermi gases with synthetic non-Abelian gauge fields
• Fulde-Ferrell superfluids in an asymmetric three-component Fermi Gas