# High-temperature superconductivity in sulfur hydride evidenced by alternating-current magnetic susceptibility

Article · Xiaoli Huang, Xin Wang, Defang Duan, Bertil Sundqvist, Xin Li, Yanping Huang, Hongyu Yu, Fangfei Li, Qiang Zhou, Bingbing Liu, Tian Shu Cui

- Archive id: doi:10.1093/nsr/nwz061
- Published: 2019-05-08
- Venue: National Science Review
- DOI: https://doi.org/10.1093/nsr/nwz061
- PMID: 34691926
- Citations: 97
- Source URL: https://doi.org/10.1093/nsr/nwz061
- PDF: https://academic.oup.com/nsr/article-pdf/6/4/713/30336671/nwz061.pdf
- Provenance: openalex

## Abstract

ABSTRACT The search for high-temperature superconductivity is one of the research frontiers in physics. In the sulfur hydride system, an extremely high Tc (∼200 K) has been recently developed at pressure. However, the Meissner effect measurement above megabar pressures is still a great challenge. Here, we report the superconductivity identification of sulfur hydride at pressure, employing an in situ alternating-current magnetic susceptibility technique. We determine the superconducting phase diagram, finding that superconductivity suddenly appears at 117 GPa and Tc reaches 183 K at 149 GPa before decreasing monotonically with increasing pressure. By means of theoretical calculations, we elucidate the variation of Tc in the low-pressure region in terms of the changing stoichiometry of sulfur hydride and the further decrease in Tc owing to a drop in the electron–phonon interaction parameter λ. This work provides a new insight into clarifying superconducting phenomena and anchoring the superconducting phase diagram in the hydrides.

_Abstract reproduced under CC-BY (publisher license, via OpenAlex)._

Topics: [Superconducting Hydrides Under Pressure](https://space-kitty.com/topics/hydride-superconductors)

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