Emergent Fano-Feshbach resonance in two-band superconductors with an incipient quasi-flat band: Enhanced critical temperature evading particle-hole fluctuations

Hiroyuki Tajima, Hideo Aoki, Andrea Perali +1

In superconductivity, a surge of interests in enhancing $T_{\mathrm{c}}$ is ever mounting, where a recent focus is toward multi-band superconductivity. In $T_{\mathrm{c}}$ enhancements speci…