High-temperature superconductivity of ceramic systems

Abstract

On the basis of fluctuation theory of the high-temperature superconductivity (HTS) the spectrum of quasi-particles exchanged by electron pairs in high-temperature ceramic superconductors is treated. It was shown, that unlike low-temperature superconductors where the electrons exchange virtual phonons, in HTS the electrons must exchange virtual quasi-phonons which are quanta of the coupled oscillations of the crystal lattice ions with the spin fluctuations of the conduction electrons. We calculated the spin-phonon coupling parameter, the critical temperature of HTS T c and determined the methods of synthesizing of new HTS compounds.