Pressure-induced superconductivity in PrOxFeAs

TL;DR

This study reports the induction of superconductivity at 45 K in PrOxFeAs through high-pressure treatment, providing insights into the mechanisms of iron-based superconductors.

Contribution

It demonstrates pressure-induced superconductivity in PrOxFeAs and compares it with samples prepared at different conditions, advancing understanding of superconductivity origins.

Findings

Superconductivity at 45 K achieved under 6 GPa pressure.

Pressure treatment induces superconductivity not present in ambient conditions.

Electrical transport behavior similar to parent ReOFeAs observed.

Abstract

Superconductivity with Tc of 45 K was realized in the tetragonal ZrCuSiAs-type PrOxFeAs (x=0.75) under heat treatment of 1300 oC and pressure of 6 GPa for 2 hours. Although the sample prepared at 900 oC in vaccum possessed the same phase as that treated in pressure, the electrical transport measurement showed the similar behavior with its parent ReOFeAs (Re: rare-earth metal). This pressure-induced superconductivity could give us a hint to understand the origins of the newly-found iron based superconductors.