Doped high-Tc superconductors under pressure

Abstract Within the BCS framework generalized Fermi surface topologies, modeled with band overlapping, are proposed as a mechanism to enhance the electronic density of states at the Fermi level. This band overlapping allows the high- T c values observed in cuprate superconductors at different pressures. With this approach the correlation between the critical temperature, the charge carrier density and the pressure is obtained in terms of the coupling constant and the band overlapping parameter. In order to obtain numerical results the model is applied to a Tl-based superconductor.