The effect of electron correlation on the superconducting and normal properties of the cuprates

TL;DR

This paper explores how strong electron correlations in cuprates influence their superconducting and normal state properties, providing a unified explanation for experimental observations through a correlation-enhanced effective mass model.

Contribution

It introduces a model linking electron correlation length to effective mass, explaining superconducting transition temperatures and normal state anomalies in cuprates.

Findings

Tc vs dopant curves match experimental data

Superconducting gaps align with observations

Normal state resistivity and optical conductivity are explained

Abstract

The strong electron correlation in the cuprates can lead to an enhanced effective mass for both bosonic and fermionic quasiparticles. Where this correlation is characterized by a length that is inversely proportional to the effective temperature, the thermal wavelength for the bosonic quasiparticles becomes essentially independent of temperature. Applying this concept to a preformed pair model, such as the (Cu)13 cluster model, gives Tc vs dopant curves and superconducting gaps in good agreement with experiment. In addition, a correlation-enhanced effective mass provides a natural explanation for the anomalous normal state resistivity and optical conductivity of the cuprates.