Tuning Rashba and Dresselhaus spin-orbit couplings: Effects on singlet and triplet condensation with Fermi atoms
arXiv:1208.1637 · doi:10.1103/PhysRevA.86.053632
Abstract
We investigate the pair condensation of a two-spin-component Fermi gas in the presence of both Rashba and Dresselhaus spin-orbit couplings. We calculate the condensate fraction in the BCS-BEC crossover both in two and in three dimensions by taking into account singlet and triplet pairings. These quantities are studied by varying the spin-orbit interaction from the case with the only Rashba to the equal-Rashba-Dresselhaus one. We find that, by mixing the two couplings, the singlet pairing decreases while the triplet pairing is suppressed in the BCS regime and increased in the BEC regime, both in two and three dimensions. At fixed spin-orbital strength, the greatest total condensate fraction is obtained when only one coupling (only Rashba or only Dresselhaus) is present.
9 pages, 6 figures, final version
References in corpus (11)
- Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
- Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
- Collective excitations of a degenerate gas at the BEC-BCS crossover
- Observation of a two-dimensional Fermi gas of atoms
- Effect of Induced Spin-Orbit Coupling for Atoms via Laser Fields
- BCS-BEC crossover induced by a synthetic non-Abelian gauge field
- Polaron-molecule transitions in a two-dimensional Fermi gas
- Superfluidity at the BEC-BCS crossover in two-dimensional Fermi gases with population and mass imbalance
- Critical Temperature and Condensate Fraction of a Fermion Pair Condensate
- Condensate Fraction of a Two-Dimensional Attractive Fermi Gas
- Condensate formation with three-component ultracold fermions
Cited by in corpus (4)
- Induced interactions in the BCS-BEC crossover of two-dimensional Fermi gases with Rashba spin-orbit coupling
- Nature of the mixed-parity pairing of attractive fermions with spin-orbit coupling in optical lattice
- Pair condensation of polarized fermions in the BCS-BEC crossover
- Rabi coupled fermions in the BCS-BEC crossover