Temperature and doping dependences of the coherence length and Hc2 in the two-components model for LSCO thin films and other cuprates

Abstract

The Ginzburg–Landau (GL) equations for a two-component high- T c superconductor are derived. The repulsive interactions induce the high- T c superconductivity. The calculated dependence H c2( p) on the concentration of doped holes p for cuprates has the maximum as a function of p. A positive curvature for H c2( T) with no evidence of saturation at low temperatures is obtained.