Electronic Specific Heat of s-,p-, and d-wave Superconducting States

Abstract

Based on the BCS formalism, a comparative study of the electronic specific heat for s‐, p, and d‐symmetry superconducting states is performed in a square lattice described by a generalized Hubbard model, in which correlated‐hopping interactions are included in addition to the repulsive Coulomb ones. The p‐ and d‐wave superconducting states are respectively obtained at middle and high electronic density regimes, i.e. the later is formed by holes and in fact, its critical temperature is two orders of magnitude larger than the p‐channel one. The electronic specific heat analysis shows a power law behavior in p‐ and d‐wave superconducting states, instead of the exponential temperature dependence found in the s channel. Finally, a good agreement with experimental data from Sr2RuO4 is obtained.