Flat band induced non-Fermi liquid behavior of multicomponent fermions

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2021-03-03
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Language
en
Pages
7
1-7
Series
Physical Review A, Volume 103, issue 3
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.
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Condensed Matter - Quantum Gases
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Citation
Kumar , P , Peotta , S , Takasu , Y , Takahashi , Y & Törmä , P 2021 , ' Flat band induced non-Fermi liquid behavior of multicomponent fermions ' , Physical Review A , vol. 103 , no. 3 , L031301 , pp. 1-7 . https://doi.org/10.1103/PhysRevA.103.L031301