Correlation between crystal structure and superconductivity in LaO0.5F0.5BiS2

TL;DR

This study investigates how uniaxial strain along the c axis in LaO0.5F0.5BiS2 influences its superconducting properties, revealing that high-pressure annealing enhances superconductivity through structural modification.

Contribution

It demonstrates that uniaxial strain along the c axis, induced by high-pressure annealing, enhances superconductivity in LaO0.5F0.5BiS2, linking structural changes to superconducting performance.

Findings

High-pressure annealing induces uniaxial strain along the c axis.

Strained samples show improved superconducting properties.

Uniaxial strain positively correlates with superconductivity enhancement.

Abstract

Correlation between crystal structure and superconducting properties of the BiS2-based superconductor LaO0.5F0.5BiS2 was investigated. We have prepared LaO0.5F0.5BiS2 polycrystalline samples with various lattice constants. It was found that the annealing the sample under high pressure generated uniaxial strain along the c axis. Further, the highly-strained sample showed higher superconducting properties. We concluded that the uniaxial strain along the c axis was positively linked with the enhancement of superconductivity in the LaO1-xFxBiS2 system.