Hard-Wired Dopant Networks and the Prediction of High Transition Temperatures in Ceramic Superconductors

Abstract

The prediction of transition temperatures can be regarded in several ways, either as an exacting test of theory, or as a tool for identifying theoretical rules for defining new homology models. Popular "first principle" methods for predicting transition temperatures in conventional crystalline superconductors have failed for cuprate HTSC, as have parameterized models based on CuO 2 planes (with or without apical oxygen). Following a path suggested by Bayesian probability, we find that the glassy, selforganized dopant network percolative model is so successful that it defines a new homology class appropriate to ceramic superconductors. The reasons for this success are discussed, and a critical comparison is made with previous theories. The predictions are successful for all ceramics, including new non-cuprates based on FeAs in place of CuO 2 .

High-temperature superconductivity: the explanation

“…A lattice disorder introduces additional complexity to the problem since an interference of impurity potential with the lattice distortion, which accompanies the polaron movement, contributes to the polaron and bipolaron localization [87]. Self-organized discrete dopant networks [88] lead to multiscale complexity for key materials as well. However the detailed microscopic physics of the bosonic many body state seems to be irrelevant for fitting their electrodynamic properties [89].…”