Cooper pairing in oxide superconductors

Abstract

By assuming the existence of a short range non-phonic attractive interaction the original Cooper pairing theory is reformulated for oxide superconductors. We use a three square well model for the three interactions (electron-phonon, Coulomb and non-phonic) and incorporate the effect of van Hove singularity in the calculation. Our analytic solutions for the pair binding energy allow one to visualize the relative interplay between various interactions and calculate the strength of the underlying mechanism responsible for the high superconducting critical temperature. © 1991.