Phase diagrams for P- and D-wave superconducting states

Abstract

A comparative study of the superconducting states with p and d symmetries, as a function of the electronic density (n), was performed by using the BCS formalism in a slightly distorted square lattice described by a generalized Hubbard model, in which the correlated hopping interactions are included in addition to Coulombic repulsions. The phase diagrams for p- and d-wave superconducting states are determined by calculating the Helmholtz free energy and the results suggest that the d-wave superconducting state is more stable than the p-wave one at high temperatures.