Growth and superconducting properties of Cd-doped La(O,F)BiS2 single crystals

TL;DR

This study reports the growth of Cd-doped La(O,F)BiS2 single crystals and investigates how Cd doping affects their superconducting properties, showing a suppression of Tc without significantly altering anisotropy.

Contribution

It provides new insights into the effects of Cd doping on La(O,F)BiS2 superconductors by successfully growing single crystals and analyzing their superconducting behavior.

Findings

Cd doping suppresses superconducting transition temperature.

Superconducting transition temperature of 2.3 K achieved with 8% Cd doping.

Cd doping does not significantly change superconducting anisotropy.

Abstract

Cd-doped La(O,F)BiS2 single crystals were grown using a CsCl/KCl flux. The grown crystals have a plate-like shape with ~1-2 mm square size in a well-developed ab-plane. The Cd doping in the crystals was successfully characterized by single crystal X-ray diffraction and electron probe microanalysis techniques. The superconductivity of La(O,F)BiS2 was gradually suppressed with Cd doping. The superconducting transition temperature with zero resistivity of La(O0.54F0.46)(Bi0.92Cd0.08)S2 was 2.3 K. The Cd doping does not change the superconducting anisotropy so much, albeit the considerable suppression of Tc.