Evolution of superconductivity in LaO1-xFxBiS2 prepared by high pressure technique

TL;DR

This study investigates how high pressure synthesis affects the structure and superconducting properties of LaO1-xFxBiS2, revealing a broad F-concentration range with bulk superconductivity and establishing a phase diagram.

Contribution

It demonstrates the impact of high pressure annealing on lattice properties and superconductivity in LaO1-xFxBiS2, providing new insights into its phase diagram.

Findings

High pressure annealing enhances lattice stability.

Bulk superconductivity observed for x=0.2 to 0.7.

Established a phase diagram of LaO1-xFxBiS2.

Abstract

Novel BiS2-based superconductors LaO1-xFxBiS2 prepared by the high pressure synthesis technique were systematically studied. It was found that the high pressure annealing strongly the lattice as compared to the LaO1-xFxBiS2 samples prepared by conventional solid state reaction at ambient pressure. Bulk superconductivity was observed within a wide F-concentration range of x = 0.2 ~ 0.7. On the basis of those results, we have established a phase diagram of LaO1-xFxBiS2.