Abstract
Before 1986 it was generally believed that ceramic oxides are poorconductors for electrical conduction. Against this perception asurprise appeared in late 1986 by Bednorz and Müller, who showed thata doped ceramic cuprate becomes a high temperature superconductor. Nowwe find several dozens of high Tc superconductors and they are allceramic perovskites. Although a large volume of literature exists onvarious aspect of high Tc materials, yet we are far from understandingthe real mystery- how these ceramic materials superconduct? In thistalk I present an appraisal of variety of observed anomalies anddiscuss what do these anomalies indicate towards the microscopicmechanism of superconducting pairing?
