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arXiv · 1206.5380

A two-dimensional Fermi liquid with attractive interactions

B. Fröhlich·M. Feld·E. Vogt·M. Koschorreck·M. Köhl·C. Berthod·T. Giamarchi
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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.

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B. Fröhlich, M. Feld, E. Vogt, M. Koschorreck, M. Köhl, C. Berthod, T. Giamarchi. 2012-09-26. A two-dimensional Fermi liquid with attractive interactions. https://doi.org/10.1103/physrevlett.109.130403

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