Flat-band-induced non-Fermi-liquid behavior of multicomponent fermions

• Kumar, Pramod

• Peotta, Sebastiano

• Takasu, Yosuke

• Takahashi, Yoshiro

• Törmä, Päivi

Abstract

We investigate multicomponent fermions in a flat band and predict experimental signatures of non-Fermi-liquid behavior. We use dynamical mean-field theory to obtain the density, double occupancy and entropy in a Lieb lattice for N = 2 and N = 4 components. We derive a mean-field scaling relation between the results for different values of N, and study its breakdown due to beyond mean-field effects. The predicted signatures occur at temperatures above the Néel temperature and persists even in the presence of a trapping potential, thus they are observable in current ultracold gas experiments.

Journal

• Physical Review A

  Physical Review A 103 (3), 2021-03

  American Physical Society (APS)

Details

• CRID: 1050006895504248960
• NII Article ID: 120007043361
• ISSN: 24699934
• ISSN: 24699926
• HANDLE: 2433/263308
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles