Theory of High-Tc Superconducting Cuprates Based on Experimental Evidence

TL;DR

This paper proposes a theoretical model for high-temperature superconductivity in cuprates, integrating electron spectrum features, Coulomb interactions, phonon effects, and spin fluctuations to explain various experimental phenomena.

Contribution

It introduces a comprehensive model combining multiple interactions to explain high-Tc superconductivity in cuprates, supported by experimental evidence.

Findings

Explains large Tc values and isotope effects.

Accounts for two types of order parameters.

Describes features like neutron scattering peaks and critical field behavior.

Abstract

A model of superconductivity in layered high-temperature superconducting cuprates is proposed, based on the extended saddle point singularities in the electron spectrum, weak screening of the Coulomb interaction and phonon-mediated interaction between electrons plus a small short -range repulsion of Hund's, or spin-fluctuation, origin. This permits to explain the large values of $Tc$, features of the isotope effect on oxygen and copper, the existence of two types of the order parameter, the peak in the inelastic neutron scattering, the positive curvature of the upper critical field, as function of temperature etc.