Role of an Extended d-Wave Gap on Superfluid Density and Critical Current Density in Cuprate Superconductors

Abstract

In this study, we examined the superfluid density, ρs, and the critical current density, Jc in cuprate superconductors. To calculate the superconducting gap and the superfluid density, we applied the Chandrasekhar and Einzel approach, employing an extended d-wave symmetry of the gap. In particular, to determine the superfluid density, the temperature dependence of the extended d-wave gap magnitude has been calculated using the self-consistent gap equation. We compared the results of our calculations for the critical current density with experimental data obtained from different cuprate superconductors. In all the cases we examined, we found a good agreement between the theory and the experimental data.