Pseudo gap and superconducting gap in strong coupling superconductors

Abstract

The explanation about how the pseudo gap phase is connected to its superconducting phase in cuprates and organics is presented on the basis of the superconducting fluctuation. The superconducting gap equation with the superconducting fluctuation included is solved and electronic properties are investigated by the self-consistent T-matrix approximation above and below the transition temperature ( T c). It is found that the rapid increase of the order parameter below T c is a characteristic feature of the strong coupling superconductors.