Doping dependence of thermodynamic properties in cuprate superconductors

TL;DR

This study models how doping levels affect thermodynamic properties in cuprate superconductors, revealing the interplay between pseudogap phenomena and superconductivity, and reproducing key experimental features.

Contribution

It introduces a kinetic energy driven mechanism considering pseudogap effects to explain doping and temperature dependence of thermodynamic properties in cuprates.

Findings

Maximal upper critical field occurs near optimal doping.

Specific heat anomaly linked to pseudogap emergence.

Reproduces doping dependence of critical temperature and other properties.

Abstract

The doping and temperature dependence of the thermodynamic properties in cuprate superconductors is studied based on the kinetic energy driven superconducting mechanism. By considering the interplay between the superconducting gap and normal-state pseudogap, the some main features of the doping and temperature dependence of the specific-heat, the condensation energy, and the upper critical field are well reproduced. In particular, it is shown that in analogy to the domelike shape of the doping dependence of the superconducting transition temperature, the maximal upper critical field occurs around the optimal doping, and then decreases in both underdoped and overdoped regimes. Our results also show that the humplike anomaly of the specific-heat near superconducting transition temperature in the underdoped regime can be attributed to the emergence of the normal-state pseudogap in cuprate superconductors.