Superconductivity of the FeSe/SrTiO3 Interface in the View of BCS-BEC Crossover

Shuyuan Zhang, Guangyao Miao, Jiaqi Guan +6

In paired Fermi systems, strong many-body effects exhibit in the crossover regime between the Bardeen-Cooper-Schrieffer (BCS) and the Bose-Einstein condensation (BEC) limits. The c…