Anisotropic Superconducting Properties of Optimally Doped BaFe$_2$(As$_{0.65}$P$_{0.35}$)$_2$ under Pressure

TL;DR

This study investigates how applying pressure affects the anisotropic superconducting properties of optimally doped BaFe$_2$(As$_{0.65}$P$_{0.35}$)$_2$, revealing increased anisotropy despite a decrease in critical temperature.

Contribution

It provides the first detailed analysis of pressure-induced changes in anisotropy and coherence lengths in this compound, linking pressure effects to doping levels.

Findings

Superconducting anisotropy increases under pressure.

Coherence lengths evolve with pressure.

Superconducting properties can be scaled with phosphorus content.

Abstract

Magnetic measurements on optimally doped single crystals of BaFe$_2$(As$_{1-x}$P$_{x}$)$_2$ ($x\approx0.35$) with magnetic fields applied along different crystallographic axes were performed under pressure, enabling the pressure evolution of coherence lengths and the anisotropy factor to be followed. Despite a decrease in the superconducting critical temperature, our studies reveal that the superconducting properties become more anisotropic under pressure. With appropriate scaling, we directly compare these properties with the values obtained for BaFe$_2$(As$_{1-x}$P$_{x}$)$_2$ as a function of phosphorus content.