Flat band induced non-Fermi liquid behavior of multicomponent fermions

Pramod Kumar, Sebastiano Peotta, Yosuke Takasu, Yoshiro Takahashi, Päivi Törmä

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
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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.
Original languageEnglish
Article numberL031301
Pages (from-to)1-7
Number of pages7
JournalPhysical Review A
Issue number3
Publication statusPublished - 3 Mar 2021
MoE publication typeA1 Journal article-refereed


  • Condensed Matter - Quantum Gases


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