Superconductivity in Multilayer Perovskite: Weak Coupling Analysis

TL;DR

This paper analyzes superconductivity in multilayer perovskite structures using weak coupling theory, revealing that multilayer configurations can stabilize superconductivity across various doping levels.

Contribution

It introduces a multilayer d-p model for high-Tc cuprates and demonstrates how multilayer structures enhance superconductivity stability.

Findings

Multiple Fermi surfaces appear in the model.

Superconductivity is stabilized over a wide doping range.

Component of the gap function develops on each band.

Abstract

We investigate the superconductivity of a three-dimensional d-p model with a multilayer perovskite structure on the basis of the second-order perturabation theory within the weak coupling framework. Our model has been designed with multilayer high-$T_c$ superconducting cuprates in mind. In our model, multiple Fermi surfaces appear, and the component of a superconducting gap function develops on each band. We have found that the multilayer structure can stabilize the superconductivity in a wide doping range.