The charge asymmetry in superconductivity of hole- and electron-doped cuprates

TL;DR

This paper investigates the charge asymmetry in superconductivity between hole- and electron-doped cuprates using the t-t'-J model, revealing differences in doping range and maximum transition temperatures.

Contribution

It introduces a theoretical analysis of charge asymmetry in cuprates' superconductivity based on the kinetic energy driven mechanism within the t-t'-J model.

Findings

Superconductivity occurs over a narrow doping range in electron-doped cuprates.

The doping dependence of the transition temperature is similar in both types.

Maximum Tc in electron-doped cuprates is significantly lower than in hole-doped ones.

Abstract

Within the t-t'-J model, the charge asymmetry in superconductivity of hole- and electron-doped cuprates is studied based on the kinetic energy driven superconducting mechanism. It is shown that superconductivity appears over a narrow range of doping in electron-doped cuprates, and the superconducting transition temperature displays the same kind of the doping controlled behavior that is observed in the hole-doped case. However, the maximum achievable superconducting transition temperature in the optimal doping in electron-doped cuprates is much lower than that of the hole-doped case due to the electron-hole asymmetry.