Superconductivity in PtSbS with a Noncentrosymmetric Cubic Crystal Structure

TL;DR

This paper reports the discovery of superconductivity in the noncentrosymmetric cubic compound PtSbS, with detailed synthesis, experimental characterization, and electronic structure analysis indicating potential mechanisms behind its superconducting behavior.

Contribution

It presents the first synthesis and characterization of PtSbS as a bulk superconductor with a noncentrosymmetric cubic structure, supported by electronic structure calculations.

Findings

Superconducting transition temperature Tc = 0.15 K

Presence of strongly nested Fermi surface pockets

Noncentrosymmetric cubic crystal structure

Abstract

We report the synthesis, electronic properties, and electronic structure of ullmannite-type PtSbS, which has a cubic crystal structure without space inversion symmetry. Electrical resistivity and magnetization measured at low temperatures suggested that this compound is a bulk superconductor with a superconducting transition temperature of Tc = 0.15 K. First principles calculations indicated that Fermi surfaces of PtSbS include strongly nested hole pockets, which can make this compound interesting if they contribute to the emergence of superconductivity.