2025/12/08 by Bouzerar, Georges, Thumin, Maxime
#FOS: Physical sciences #Quantum Physics (quant-ph) #Superconductivity (cond-mat.supr-con)
paper · doi:10.48550/arxiv.2512.07648
Recently, the possibility of high-temperature superconductivity (SC) in flat-band (FB) systems has been the focus of a great deal of activity. This study reveals that unlike conventional intra-band SC for which disorder has a dramatic impact, that associated with FBs is surprisingly robust to disorder-induced fluctuations and quasi-particle localization. In particular, for weak off-diagonal disorder, the critical temperature decreases linearly with disorder amplitude for conventional SC, whereas it is only quadratic in the case of SC in FBs. Our findings could have a major impact on the research and development of new compounds whose high purity will no longer be a critical barrier to their synthesis.