Faulty evidence for superconductivity in ac magnetic susceptibility of sulfur hydride under pressure

TL;DR

This paper challenges previous claims of superconductivity in sulfur hydride under high pressure by presenting evidence that questions the validity of earlier experimental results.

Contribution

It provides a critical re-evaluation of prior experimental data, arguing that the evidence for superconductivity in sulfur hydride is not supported.

Findings

Previous ac magnetic susceptibility results are inconsistent with superconductivity

The reported phase diagram does not conclusively indicate superconductivity

Experimental evidence does not support sulfur hydride as a superconductor under high pressure

Abstract

It is generally believed that sulfur hydride under high pressure is a high temperature superconductor. In National Science Review 6, 713 (2019) Huang and coworkers reported detection of superconductivity in sulfur hydride through a highly sensitive ac magnetic susceptibility technique and an unambiguous determination of the superconducting phase diagram. In this paper we present evidence showing that the experimental results reported in that paper do not support the conclusion that sulfur hydride is a superconductor.