Effect of nonuniform hole-content distribution within the interlayer pair-tunneling mechanism of layered HTSC

Abstract

The interlayer pair-tunneling (ILT) mechanism for high-$T_c$ superconductivity is able to predict the dependence of the (optimal) critical temperature Tc on the number of layers n within an homologous series of layered cuprate oxides. We generalize the mean-field procedure employed to evaluate Tc within an extended in-plane Hubbard model in presence of ILT, developed for a bilayer complex (n = 2), to the case of n = 3, 4 inequivalent superconducting layers. As a function of doping, we show how a nonuniform hole-content distribution among different layers affects Tc. In particular, depending on doping, the onset of superconductivity may be ruled by inner or outer layers. The latter result may be related to recent experimental data of Tc as a function of pressure in Tl- and Bi-based layered superconductors.

References in corpus (3)

• Out-of-plane instability and electron-phonon contribution to s- and d-wave pairing in high-temperature superconductors; LDA linear-response calculation for doped CaCuO2 and a generic tight-binding model
• Interplay among critical temperature, hole content, and pressure in the cuprate superconductors
• Sharp k-space features in the order parameter within the interlayer pair-tunneling mechanism of high-T_c superconductivity

Cited by in corpus (2)

• A 3D Tight-Binding Model for La-Based Cuprate Superconductors
• Pressure dependence of superconducting and magnetic critical temperatures in the ruthenocuprates