@article{4e651e0800f5416bbf1c37319bea3bf8,
title = "Superconducting pairing from repulsive interactions of fermions in a flat-band system",
abstract = "Fermion systems with flat bands can boost superconductivity by enhancing the density of states at the Fermi level. We use quasiexact numerical methods to show that repulsive interactions between spinless fermions in a one-dimensional (1D) flat-band system, the Creutz ladder, give a finite pairing energy that increases with repulsion, though charge quasiorder remains dominant. Adding an attractive component shifts the balance in favor of superconductivity and the interplay of two flat bands further yields a remarkable enhancement of superconductivity, well outside of known paradigms for 1D fermions.",
author = "I. Mahyaeh and T. K{\"o}hler and Black-Schaffer, {A. M.} and A. Kantian",
note = "Funding Information: We would like to thank Lorenzo Gotta, Leonardo Mazza, and Paola Ruggiero for helpful discussions. I.M. and A.M.B.-S. acknowledge financial support from the Knut and Alice Wallenberg Foundation through the Wallenberg Academy Fellows program and the Swedish Research Council (Vetenskapsr{\aa}det Grant No. 2018-03488). This work has received funding through an ERC Starting Grant from the European Union's Horizon 2020 research and innovation program under Grant Agreement No. 758935. The computations were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) at KTH Parallelldatorcentrum (PDC) and Uppsala Multidisciplinary Center for Advanced Computational Science (UPPMAX) partially funded by the Swedish Research Council through Grant No. 2018-05973. Publisher Copyright: {\textcopyright} 2022 authors. Published by the American Physical Society.",
year = "2022",
month = sep,
day = "15",
doi = "10.1103/PhysRevB.106.125155",
language = "English",
volume = "106",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "12",
}