Two-Dimensional Fermi Liquid with Attractive Interactions

2012/06/30 by Bernd Fröhlich, B. Fröhlich, M. Feld +11
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Fermi Gamma-ray Space Telescope #Fermi gas #Fermi liquid theory #Harmonic #Materials science #Measure (data warehouse) #Momentum (technical analysis) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum, superfluid, helium dynamics #Range (aeronautics) #cond-mat.quant-gas

paper · pdf · doi:10.1103/physrevlett.109.130403

published as Phys. Rev. Lett. 109, 130403 (2012)

arxiv created 2012/09/26 · openalex publication_date 2012/09/26 · arxiv updated 2012/09/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Angle-resolved photoemission studies of the cuprate superconductors
• Momentum Resolved Radio Frequency Spectroscopy in Trapped Fermi Gases
• Radio-Frequency Spectroscopy of a Strongly Interacting Two-Dimensional Fermi Gas
• Leading Temperature Corrections to Fermi-Liquid Theory in Two Dimensions
• Feshbach resonances in ultracold gases
• Using photoemission spectroscopy to probe a strongly interacting Fermi gas
• Measuring the One-Particle Excitations of Ultracold Fermionic Atoms by Stimulated Raman Spectroscopy
• Universal short-distance structure of the single-particle spectral function of dilute Fermi gases