Flat-band-induced non-Fermi-liquid behavior of multicomponent fermions
Kumar, Pramod; Peotta, Sebastiano; Takasu, Yosuke; Takahashi, Yoshiro; Törmä, Päivi (2021-03)
Kumar, Pramod
Peotta, Sebastiano
Takasu, Yosuke
Takahashi, Yoshiro
Törmä, Päivi
03 / 2021
L031301
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202201211496
https://urn.fi/URN:NBN:fi:tuni-202201211496
Kuvaus
Peer reviewed
Tiivistelmä
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.
Kokoelmat
- TUNICRIS-julkaisut [19011]