Pressure dependence of superconductivity in doped two-leg ladder cuprates

TL;DR

This study investigates how pressure influences superconductivity in doped two-leg ladder cuprates, revealing a dome-shaped dependence of the transition temperature on pressure, linked to pairing correlations along the ladder legs.

Contribution

It demonstrates the pressure dependence of superconductivity in doped two-leg ladder cuprates within the kinetic energy driven mechanism, highlighting the role of pairing correlations along the ladder legs.

Findings

Superconducting transition temperature increases with pressure in the underpressure regime.

Maximum transition temperature occurs at optimal pressure.

Transition temperature decreases beyond optimal pressure, forming a dome-shaped curve.

Abstract

Within the kinetic energy driven superconducting mechanism, the effect of the pressure on superconductivity in doped two-leg ladder cuprates is studied. It is shown that the superconducting transition temperature in doped two-leg ladder cuprate superconductors increases with increasing pressure in the underpressure regime, and reaches a maximum in the optimal pressure, then decreases in the overpressure regime. This domed shape of the pressure dependence of the superconducting transition temperature is similar to that of the pressure dependence of the longitudinal part of the superconducting gap parameter, indicating that superconductivity in doped two-leg ladder cuprates is mainly produced by the development of the pairing correlation along legs.