Quasiparticle energies for a two-band interlayer-coupling model of a high-Tc superconductor

Abstract

Much of the recent literature on the high-Tc, layered, cuprate superconductors emphasizes the necessity of including in theoretical models of these materials both oxygen and copper bands and, more recently, interlayer correlations. Accordingly, we construct a Hamiltonian that takes into account these requirements, and use it, together with existing decoupling methods and extensions thereof, to calculate the superconducting-state quasiparticle energies. Our result is a generalization, which contains corrections due to the interlayer parameters, of the quasiparticle energies for the corresponding equivalent one-layer model. These corrections indicate the presence of two superconductor gaps in the wide oxygen band and provide a starting point for obtaining self-consistent gap equations.

Source-reported materials — not catalogue approval

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