A two-dimensional Fermi liquid with attractive interactions

Abstract

We realize and study an attractively interacting two-dimensional Fermi liquid. Using momentum resolved photoemission spectroscopy, we measure the self-energy, determine the contact parameter of the short-range interaction potential, and find their dependence on the interaction strength. We successfully compare the measurements to a theoretical analysis, properly taking into account the finite temperature, harmonic trap, and the averaging over several two-dimensional gases with different peak densities.

References in corpus (22)

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• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Energetics of a strongly correlated Fermi gas
• Using photoemission spectroscopy to probe a strongly interacting Fermi gas
• Attractive and repulsive Fermi polarons in two dimensions
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• Verification of universal relations in a strongly interacting Fermi gas
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• Particle distribution tail and related energy formula
• Temperature dependence of the contact in a unitary Fermi gas
• Probing the Spectral Function Using Momentum Resolved Radio Frequency Spectroscopy in Trapped Fermi Gases
• Universal Short-Distance Structure of the Single-Particle Spectral Function of Dilute Fermi Gases
• Clock shift in a strongly interacting two-dimensional Fermi gas
• Leading Temperature Corrections to Fermi Liquid Theory in Two Dimensions
• Pairing-gap, pseudo-gap, and no-gap phases in the radio-frequency spectra of a trapped unitary 6Li gas

Cited by in corpus (46)

• BCS-BEC Crossover and the Unitary Fermi Gas
• Two-Dimensional Homogeneous Fermi Gases
• Ground-state pressure of quasi-2D Fermi and Bose gases
• Universal spin dynamics in two-dimensional Fermi gases
• Evidence for universal relations describing a gas with $p$-wave interactions
• Universal equation of state and pseudogap in the two-dimensional Fermi gas
• Pressure, compressibility, and contact of the two-dimensional attractive Fermi gas
• Observation of quantum-limited spin transport in strongly interacting two-dimensional Fermi gases
• Angle-resolved photoemission spectroscopy of a Fermi-Hubbard system
• Pair Correlations in the Two-Dimensional Fermi Gas
• High temperature pairing in a strongly interacting two-dimensional Fermi gas
• Pairing effects in the normal phase of a two-dimensional Fermi gas
• Measurement of the Dynamical Structure Factor of a 1D Interacting Fermi Gas
• Diffusion Monte Carlo study of strongly interacting two-dimensional Fermi gases
• Quantum anomaly and thermodynamics of one-dimensional fermions with three-body interactions
• Collective modes in interacting two-dimensional tomographic Fermi liquids
• Ground state of the two-dimensional attractive Fermi gas: essential properties from few- to many-body
• Measuring pair correlations in Bose and Fermi gases via atom-resolved microscopy
• Few-body correlations in two-dimensional Bose and Fermi ultracold mixtures
• Two-dimensional short-range interacting attractive and repulsive Fermi gases at zero temperature
• Virial coefficients of 1D and 2D Fermi gases by stochastic methods and a semiclassical lattice approximation
• Fermi-Fermi crossover in the ground state of 1D few-body systems with anomalous three-body interactions
• Precision Many-Body Study of the Berezinskii-Kosterlitz-Thouless Transition and Temperature-Dependent Properties in the Two-Dimensional Fermi Gas
• Lattice assisted spectroscopy: a generalized scanning tunnelling microscope for ultra-cold atoms
• Dimensional Effects on the Momentum distribution of Bosonic Trimer States
• Universal Properties of Fermi Gases in One-dimension
• Thermodynamics and static response of anomalous 1D fermions via quantum Monte Carlo in the worldline representation
• Polarization of a quasi two-dimensional repulsive Fermi gas with Rashba spin-orbit coupling: a variational study
• Interaction energy and itinerant ferromagnetism in a strongly interacting Fermi gas in the absence of molecule formation
• Emergent s-wave interactions between identical fermions in quasi-one-dimensional geometries
• A Quantum Field-Theoretical Perspective on Scale Anomalies in 1D systems with Three-Body Interactions
• Equation of State of Neutron-Rich Matter in $d$-Dimensions
• Harmonically trapped fermions in two dimensions: ground-state energy and contact of SU(2) and SU(4) systems via nonuniform lattice Monte Carlo
• Emergent $s$-wave interactions in orbitally active quasi-two-dimensional Fermi gases
• Nucleon Short-Range Correlations and High-Momentum Dynamics: Implications on the Equation of State of Dense Matter
• Contact parameters in two dimensions for general three-body systems
• Two-dimensional Fermi gas in antiparallel magnetic fields
• Observing Spatial Charge and Spin Correlations in a Strongly-Interacting Fermi Gas
• Pseudogap regime of a two-dimensional uniform Fermi gas
• Signatures of Fermion Pairing with Unconventional Symmetry around BCS-BEC Crossover in a Quasi-2D Lattice
• Quantum anomaly and thermodynamics of one-dimensional fermions with antisymmetric two-body interactions
• Amplitude, phase, and topological fluctuations shaping the complex phase diagram of two-dimensional superconductors
• Second-order response theory of radio-frequency spectroscopy for cold atoms
• Two-dimensional Bose and Fermi gases beyond weak coupling
• Atypical Behavior of Collective Modes in Two-Dimensional Fermi Liquids
• Precision thermodynamics of the strongly interacting Fermi gas in two dimensions