Pairing and radio-frequency spectroscopy in two-dimensional Fermi gases
arXiv:1203.6054 · doi:10.1103/PhysRevA.86.023608
Abstract
We theoretically study the normal phase properties of strongly interacting two-component Fermi gases in two spatial dimensions. In the limit of weak attraction, we find that the gas can be described in terms of effective polarons. As the attraction between fermions increases, we find a crossover from a gas of non-interacting polarons to a pseudogap regime. We investigate how this crossover is manifested in the radio-frequency (rf) spectroscopy. Our findings qualitatively explain the differences in the recent rf spectroscopy measurements of two-dimensional Fermi gases [Sommer et al., Phys. Rev. Lett. 108, 045302 (2012) and Zhang et al., Phys. Rev. Lett. 108, 235302 (2012)].
11 pages, 9 figures; v2: slightly expanded, typos corrected; v3: published version
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Cited by in corpus (7)
- Pairing effects in the normal phase of a two-dimensional Fermi gas
- Quasi-two-dimensional Fermi gases at finite temperature
- Pseudogap phenomena in a two-dimensional ultracold Fermi gas near the Berezinskii-Kosterlitz-Thouless transition
- Low-Dimensional Fluctuations and Pseudogap in Gaudin-Yang Fermi Gases
- Pseudogap regime of a two-dimensional uniform Fermi gas
- Peaks and widths of radio-frequency spectra: An analysis of the phase diagram of ultra-cold Fermi gases
- Tunneling spectra of unconventional quasi-two-dimensional superconductors