Dynamic structure factor of two-dimensional Fermi superfluid with Rashba spin-orbit coupling
arXiv:2306.05868 · doi:10.1103/PhysRevA.108.033309
Abstract
We theoretically calculate the dynamic structure factor of two-dimensional Rashba-type spinorbit coupled (SOC) Fermi superfluid with random phase approximation, and analyse the main characters of dynamical excitation sh own by both density and spin dynamic structure factor during a continuous phase transition between Bardeen-Cooper-Schrieffer superfluid and topological superfluid. Generally we find three different excitations, including collective phonon excitation, two-atom molecular and atomic excitations, and pair-breaking excitations due to two-branch structure of quasi-particle spectrum. It should be emphasized that collective phonon excitation is overlapped with a gapless DD type pair-breaking excitation at the critical Zeeman field hc, and is imparted a finite width to phonon peak when transferred momentum q is around Fermi vector kF. At a much larger transferred momentum (q = 4kF ), the pair-breaking excitation happens earlier than two-atom molecular excitation, which is different from the conventional Fermi superfluid without SOC effect.
arXiv comment10 pages, 8 figures. arXiv admin note: text overlap with arXiv:2210.10407
References in corpus (50)
- Many-Body Physics with Ultracold Gases
- A spin-orbit coupled Bose-Einstein condensate
- Theory of ultracold Fermi gases
- Spin-Orbit Coupled Degenerate Fermi Gases
- Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
- Realization of Two-Dimensional Spin-orbit Coupling for Bose-Einstein Condensates
- Majorana Fermions in Equilibrium and Driven Cold Atom Quantum Wires
- Experimental realization of a two-dimensional synthetic spin-orbit coupling in ultracold Fermi gases
- A one-dimensional liquid of fermions with tunable spin
- Amplitude / Higgs Modes in Condensed Matter Physics
- Collective mode of homogeneous superfluid Fermi gases in the BEC-BCS crossover
- Realization of ideal Weyl semimetal band in ultracold quantum gas with 3D Spin-Orbit coupling
- Bragg spectroscopy of a strongly interacting Fermi gas
- BCS-BEC crossover in a two-dimensional Fermi gas
- A Raman-induced Feshbach resonance in an effectively single-component Fermi gas
- Experimental observation of a topological band gap opening in ultracold Fermi gases with two-dimensional spin-orbit coupling
- Goldstone mode and pair-breaking excitations in atomic Fermi superfluids
- Higgs mode in a strongly interacting fermionic superfluid
- A long-lived spin-orbit-coupled degenerate dipolar Fermi gas
- Momentum transferred to a trapped Bose-Einstein condensate by stimulated light scattering
- Probing Majorana fermions in spin-orbit coupled atomic Fermi gases
- Observation of quantum phase transition in spin-orbital-angular-momentum coupled Bose-Einstein condensate
- Angular spin-orbit coupling in cold atoms
- Spin-charge separation in a 1D Fermi gas with tunable interactions
- Excitation Spectrum and Superfluid Gap of an Ultracold Fermi Gas
- Molecular signatures in the structure factor of an interacting Fermi gas
- Dark Solitons with Majorana Fermions in Spin-Orbit-Coupled Fermi Gases
- Quantum phases of Bose-Einstein condensates with synthetic spin - orbital-angular-momentum coupling
- Rotating atomic quantum gases with light-induced azimuthal gauge potentials and the observation of Hess-Fairbank effect
- Few-body precursor of the Higgs mode in a superfluid Fermi gas
- Quantitative comparison between theoretical predictions and experimental results for Bragg spectroscopy of a strongly interacting Fermi superfluid
- Collective oscillations of a confined Bose gas at finite temperature in the random-phase approximation
- Soliton-induced Majorana fermions in a one-dimensional atomic topological superfluid
- Superfluidity and collective modes in Rashba spin-orbit coupled Fermi gases
- A long-lived Higgs mode in a two-dimensional confined Fermi gas
- Visualizing the BEC-BCS crossover in the two-dimensional Fermi gas: pairing gaps and dynamical response functions from ab initio computations
- Collective Modes in a Two-band Superfluid of Ultracold Alkaline-earth Atoms Close to an Orbital Feshbach Resonance
- Impurity probe of topological superfluid in one-dimensional spin-orbit coupled atomic Fermi gases
- Low-momentum dynamic structure factor of a strongly interacting Fermi gas at finite temperature: The Goldstone phonon and its Landau damping
- Dynamical structure factors of a two-dimensional Fermi superfluid within random phase approximation
- Pure Goldstone mode in the quench dynamics of a confined ultracold Fermi gas in the BCS-BEC crossover regime
- Quench dynamics of a confined ultracold Fermi gas: Direct visibility of the Goldstone mode in the single-particle excitations
- Following the Higgs mode across the BCS-BEC crossover in two dimensions
- Second sound with ultracold atoms: A brief historical account
- Angular topological superfluid and topological vortex in an ultracold Fermi gas
- Dynamic structure factors of a strongly interacting Fermi superfluid near an orbital Feshbach resonance across the phase transition from BCS to Sarma superfluid
- Probing two Higgs oscillations in a one-dimensional Fermi superfluid with Raman-type spin-orbit coupling
- Dynamic structure factor of one-dimensional Fermi superfluid with spin-orbit coupling
- Dynamical generation of solitons in one-dimensional Fermi superfluids with and without spin-orbit coupling
- Phase diagram, band structure and density of states in two-dimensional attractive Fermi-Hubbard model with Rashba spin-orbit coupling
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