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VOLUME 124 (2026) | ISSUE 6 | PAGE 457
Some features of high-temperature superconductivity on flat bands
DOI: 10.7868/S3034576626090172
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.