Fragile Topology and Flat-Band Superconductivity in the Strong-Coupling Regime

In flat bands, superconductivity can lead to surprising transport effects. The superfluid "mobility", in the form of the superfluid weight D_{s}, does not draw from the curvature of the band but has a purely band-geometric origin. In a mean-field description, a nonzero Chern number or frag...

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Veröffentlicht in:	Physical review letters 2021-01, Vol.126 (2), p.027002-027002, Article 027002
Hauptverfasser:	Peri, Valerio, Song, Zhi-Da, Bernevig, B Andrei, Huber, Sebastian D
Format:	Artikel
Sprache:	eng
Schlagworte:	2-dimensional systems bilayer films Bilayers BKT transition CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Fluids Graphene Hubbard model Lower bounds Monte Carlo methods Phase transitions physics Robustness (mathematics) strongly correlated systems Superconductivity superconductors Superfluidity topological phases of matter Topology Transition temperature
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