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- W4308355629 abstract "Stacking two layers of graphene with a relative twist angle gives rise to Moir'e patterns, which can strongly modify electronic behavior and may lead to unconventional superconductivity. A synthetic version of twisted bilayers can be engineered with cold atoms in optical lattices. Here, the bilayer structure is mimicked through coupling between atomic sublevels, and the twist is achieved by a spatial modulation of this coupling. In the present paper, we investigate the superconducting behavior of fermionic atoms in such a synthetic twisted bilayer lattice. Attractive interactions between the atoms are treated on the mean-field level, and the superconducting behavior is analyzed via the self-consistently determined pairing gap. A strong enhancement of the pairing gap is found when a quasi-flat band structure occurs at the Fermi surface, reflecting the prominent role played by the twist on the superconductivity. The tunability of interactions allows for the switching of superconducting correlations from intra (synthetic) layer to inter (synthetic) layer. This includes also the intermediate scenario, in which the competition between inter- and intra-layer coupling completely destroys the superconducting behavior, resulting in re-entrant superconductivity upon tuning of the interactions." @default.
- W4308355629 created "2022-11-11" @default.
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- W4308355629 date "2022-11-04" @default.
- W4308355629 modified "2023-10-17" @default.
- W4308355629 title "Flat-band-induced superconductivity in synthetic bilayer optical lattices" @default.
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- W4308355629 doi "https://doi.org/10.1103/physrevb.106.174503" @default.
- W4308355629 hasPublicationYear "2022" @default.
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