Role of Interlayer and Intersite Interactions in Superconducting State in High-Tc Layered Cuprates

Abstract

We studied the role of interlayer and intersite interactions on transition temperature and specific heat of layered high-Tc cuprates. We used double-time Green's function technique in the spirit of mean field approximation in order to obtain the expressions for hole density, transition temperature, and specific heat. These expressions are found to be dependent on the carrier concentration and intersite and interlayer interactions. The numerical analysis shows that the effect of intersite interaction on transition temperature and specific heat is qualitatively similar to that of interlayer interactions and provides favorable conditions to establish long-range order in the superconducting state.