FFLO Superconductivity Mediated by Excitonic Fluctuation in Semimetallic Ta${}_2$NiSe${}_5$

Takemi Yamada, Kaoru Domon, Yoshiaki Ōno

We investigate the excitonic fluctuation and its mediated superconductivity in the quasi one-dimensional three-chain Hubbard model for Ta${}_2$NiSe${}_5$ known as a candidate material…