Polarization of a quasi two-dimensional repulsive Fermi gas with Rashba spin-orbit coupling: a variational study
arXiv:1410.5938 · doi:10.1103/PhysRevA.90.043614
Abstract
Motivated by the remarkable experimental control of synthetic gauge fields in ultracold atomic systems, we investigate the effect of an artificial Rashba spin-orbit coupling on the spin polarization of a two-dimensional repulsive Fermi gas. By using a variational many-body wavefunction, based on a suitable spinorial structure, we find that the polarization properties of the system are indeed controlled by the interplay between spin-orbit coupling and repulsive interaction. In particular, two main effects are found: 1) The Rashba coupling determines a gradual increase of the degree of polarization beyond the critical repulsive interaction strength, at variance with conventional 2D Stoner instability. 2) The critical interaction strength, above which finite polarization is developed, shows a dependence on the Rashba coupling, i.e. it is enhanced in case the Rashba coupling exceeds a critical value. A simple analytic expression for the critical interaction strength is further derived in the context of our variational formulation, which allows for a straightforward and insightful analysis of the present problem.
arXiv comment7 pages, 3 figures
References in corpus (59)
- Feshbach Resonances in Ultracold Gases
- A spin-orbit coupled Bose-Einstein condensate
- Artificial gauge potentials for neutral atoms
- Spin-Orbit Coupled Degenerate Fermi Gases
- Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
- Collective Dipole Oscillation of a Spin-Orbit Coupled Bose-Einstein Condensate
- Interatomic collisions in a tightly confined Bose gas
- Excitation Spectra of Circular Few-Electron Quantum Dots
- Quantum tri-criticality and phase transitions in spin-orbit coupled Bose-Einstein condensates
- Experimental Separation of Rashba and Dresselhaus Spin-Splittings in Semiconductor Quantum Wells
- Trapped two-dimensional condensates with synthetic spin-orbit coupling
- BCS-BEC Crossover and Topological Phase Transition in 3D Spin-Orbit Coupled Degenerate Fermi Gases
- Observation of a pairing pseudogap in a two-dimensional Fermi gas
- Bright solitons in spin-orbit-coupled Bose-Einstein condensates
- Probing anisotropic superfluidity of rashbons in atomic Fermi gases
- Spin-Orbit Coupled Fermi Gases across a Feshbach Resonance
- Effect of Induced Spin-Orbit Coupling for Atoms via Laser Fields
- Inhomogeneous phase formation on the border of itinerant ferromagnetism
- Spin-Orbit Coupled Bose-Einstein Condensate under Rotation
- Anisotropic dynamics of a spin-orbit coupled Bose-Einstein condensate
- Generalized Rashba spin-orbit coupling for cold atoms
- BCS-BEC crossover induced by a synthetic non-Abelian gauge field
- Itinerant ferromagnetism of a repulsive atomic Fermi gas: a quantum Monte Carlo study
- Itinerant Ferromagnetism in an Ultracold Atom Fermi Gas
- How does a synthetic non-Abelian gauge field influence the bound states of two spin-$\half$ fermions?
- Localized modes in dense repulsive and attractive Bose-Einstein condensates with spin-orbit and Rabi couplings
- Spin-orbit-coupled dipolar Bose-Einstein condensates
- BCS-BEC Crossover in 2D Fermi Gases with Rashba Spin-Orbit Coupling
- Stability of spin-orbit coupled Fermi gases with population imbalance
- Universal spin dynamics in two-dimensional Fermi gases
- Chiral confinement in quasirelativistic Bose-Einstein condensates
- Correlations between Ground and Excited State Spectra of a Quantum Dot
- Evolution from BCS to BEC superfluidity in the presence of spin-orbit coupling
- Topological superfluid in a trapped two-dimensional polarized Fermi gas with spin-orbit coupling
- Rashba spin-orbit coupled atomic Fermi gases
- Soliton Magnetization Dynamics in Spin-Orbit Coupled Bose-Einstein Condensates
- Spin-orbit coupling induced fractionalized Skyrmion excitations in rotating and rapidly quenched spin-1 Bose-Einstein condensates
- Phase separation in a polarized Fermi gas with spin-orbit coupling
- Opposite effect of spin-orbit coupling on condensation and superfluidity
- BCS-BEC crossover in spin-orbit coupled two-dimensional Fermi gases
- Vortex lattice solutions to the Gross-Pitaevskii equation with spin-orbit coupling in optical lattices
- Condensate fraction of a resonant Fermi gas with spin-orbit coupling in three and two dimensions
- Itinerant ferromagnetism in an atomic Fermi gas: Influence of population imbalance
- Topological phase transitions in ultra-cold Fermi superfluids: the evolution from BCS to BEC under artificial spin-orbit fields
- Stationary States of Trapped Spin-Orbit-Coupled Bose-Einstein Condensates
- A two-dimensional Fermi liquid with attractive interactions
- The effect of interactions on Bose-Einstein condensation in a two-dimensional harmonic trap
- Itinerant ferromagnetism in a two-dimensional atomic gas
- Quantum Monte Carlo study of the two-dimensional electron gas in presence of Rashba interaction
- Quantum phases of atomic Fermi gases with anisotropic spin-orbit coupling
- Ground State Properties of Spin-Orbit Coupled Bose Gases for Arbitrary Interactions
- Ultracold atoms in U(2) non-Abelian gauge potentials preserving the Landau levels
- Zero-Temperature Equation of State and Phase Diagram of Repulsive Fermionic Mixtures
- High density limit of the two-dimensional electron liquid with Rashba spin-orbit coupling
- Vortex line in spin-orbit coupled atomic Fermi gases
- Quantum Monte Carlo study of circular quantum dots in presence of Rashba interaction
- Variational Monte Carlo for spin-orbit interacting systems
- Two-dimensional quasi-ideal Fermi gas with Rashba spin-orbit coupling
- Spin-orbit excitations of quantum wells
Cited by in corpus (10)
- Quantum phase transitions and Berezinskii-Kosterlitz-Thouless temperature in a two-dimensional spin-orbit-coupled Fermi gas
- Quantum Monte Carlo simulations of two-dimensional repulsive Fermi gases with population imbalance
- A generalized Stoner criterion and versatile spin ordering in two-dimensional spin-orbit coupled electron systems
- Itinerant ferromagnetism of two-dimensional repulsive fermions with Rabi coupling
- Itinerant chiral ferromagnetism in a trapped Rashba spin-orbit coupled Fermi gas
- Exchange interactions in the Hubbard-Stratonovich transformation for the stability analysis of itinerant ferromagnetism
- Rotating a Rashba-coupled Fermi gas in two dimensions
- Polarization in a three-dimensional Fermi gas with Rabi coupling
- Interplay between Rashba spin-orbit coupling and adiabatic rotation in a two-dimensional Fermi gas
- Dynamical spin properties of confined Fermi and Bose systems in presence of spin-orbit coupling