On the theory of high-$T_\text{c}$ superconductivity of doped cuprates

TL;DR

This paper presents a theoretical analysis of how dopants induce disorder in high-$T_c$ cuprates, leading to impurity states that facilitate metallization and superconductivity with an anisotropic order parameter.

Contribution

It introduces a model where impurity subbands within the bandgap drive the transition to superconductivity in doped cuprates.

Findings

Impurity subbands form within the insulating gap.

Doping leads to system metallization.

Superconducting state with anisotropic order parameter emerges.

Abstract

A theoretical analysis is presented on possible effects of disorder by dopants in high-temperature superconducting cuprate perovskites, to define their basic spectra of spin and electronic excitations, and the subsequent observable properties, especially doping dependence of superconducting order parameter. The central point in the proposed physical picture is formation of specific impurity subband within the insulating bandgap of initial undoped material, serving as a source for the system metallization and further transition into superconducting state with anisotropic order parameter.