Persistence of small polarons into the superconducting phase of Ba${}_{1-x}$K${}_x$BiO${}_3$

Muntaser Naamneh, Eugenio Paris, Daniel McNally +12

Bipolaronic superconductivity is an exotic pairing mechanism proposed for materials like Ba${}_{1-x}$K${}_x$BiO${}_3$ (BKBO); however, conclusive experimental evidence for a (bi)polaron…