Some features of high-temperature superconductivity on flat bands
V. R. Shaginyan, A. Z. Msezane, S. A. Artamonov
Abstract
In this letter, we examine how the presence of flat band leads to the formation of a high-temperature superconductor even in the case of repulsive pairing interactions. We also show that in the case of flat bands, the high-temperature superconducting state deforms the flat band, tilting it and making the effective mass finite. As a result, neither the superfluid weight nor the supercurrent disappear. Our results are in good agreement with experimental data.
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