Growth of superconducting Sm(O,F)BiS2 single crystals

TL;DR

This paper reports the successful growth and characterization of superconducting Sm(O,F)BiS2 single crystals, revealing their structure, composition, and superconducting properties with a transition temperature of 4.8 K.

Contribution

First successful growth of superconducting Sm(O,F)BiS2 single crystals using KI-KCl flux with detailed structural and superconducting property analysis.

Findings

Single crystals were successfully grown and characterized.

The superconducting transition temperature was 4.8 K.

Superconducting anisotropies were estimated to be approximately 26.

Abstract

Superconducting Sm(O,F)BiS2 single crystals were successfully grown using KI-KCl flux. The obtained single crystals were flat-shaped and their size was 500um. The structure and composition of the obtained single crystals were obtained using X-ray diffraction and X-ray spectroscopy. The lattice constants of the obtained Sm(O,F)BiS2 single crystals were evaluated to be a = 3.9672(4) A and c = 13.417(6) A, while their F/(O + F) molar ratio was approximately 0.17. The superconducting transition temperature of the obtained Sm(O,F)BiS2 single crystals was 4.8 K. This was different from the reported Sm(O,F)BiS2 with no superconducting transition above 2 K. The superconducting anisotropies of the upper critical field and effective mass model of the obtained Sm(O,F)BiS2 single crystals were estimated to be approximately 26 and 10, respectively.