Effect of Pr doping on the superconductivity and interlayer coupling of Bi2Sr2-xPrxCa1Cu2Oy system

TL;DR

This study investigates how Pr doping affects superconductivity and interlayer coupling in Bi2212, revealing that increasing Pr weakens interlayer interactions and reduces superconducting volume, with Tc peaking then declining.

Contribution

It provides new insights into how Pr substitution influences superconducting properties and interlayer coupling in Bi2212, highlighting the weakening of interlayer interactions with doping.

Findings

Tc increases then decreases with Pr content, vanishing at x=0.6

Superconducting volume decreases due to Pr doping

Interlayer coupling constant J decreases monotonically with Pr content

Abstract

The effect of Pr substitution on the superconductivity and interlayer coupling of Bi2212 system is investigated. Magnetic and transport measurements were performed for purposes of characterization. The superconducting transition temperature Tc first increased and then decreased till it became zero at x=0.6. The effective superconducting volume also decreases due to Pr substitution. From the fluctuation conductivity analyses it is found that the interlayer coupling constant J decreases monotonically with increase of the Pr content. This result shows that the Pr doping weakens the CuO2 interlayer coupling of Bi2212 system due to the loss of local superconductivity in the CuO2 layers.