Issue 25, 2024

Orientated hydrogen chains favor superconductivity in germanium sulfur hydrides

Abstract

Hydrogen-rich compounds, as the closest to room-temperature superconductors discovered in recent years, have attracted the research interest of scientists. Especially, the recent theory-orientated discovery of record high-temperature superconductivity (Tc ∼ 330 K) in clathrate CeH18 is an important advancement toward room-temperature superconductors. In this work, we systematically investigated the phase diagram, stability, and superconducting properties of GeSHx compounds (x = 7, 8, 10, 12, 14 and 16) under compression. Here we report a superconductive structure of GeSH14 with the P21/m space group, possessing a predicted critical temperature Tc of 128 K at 180 GPa. Strikingly, P21/m GeSH14 is composed of orientated hydrogen chains bridging the adjacent Ge–S–H polyhedron layers, and is distinctly different from the typical clathrate structure in most high-Tc hydrides. Moreover, the hydrogen components mainly exist in the form of covalent atomic chains, which is crucial for stabilizing the hydrogen-rich compound and is favorable for superconductivity. The role of hydrogen atomic chains in the superconductivity is investigated extensively, and the superconducting mechanism of high-Tc is further explored. This work provides a new way of searching for high-temperature hydrogen-rich superconductors.

Graphical abstract: Orientated hydrogen chains favor superconductivity in germanium sulfur hydrides

Supplementary files

Article information

Article type
Paper
Submitted
06 فرؤری 2024
Accepted
12 میٔ 2024
First published
14 میٔ 2024

J. Mater. Chem. C, 2024,12, 9158-9164

Orientated hydrogen chains favor superconductivity in germanium sulfur hydrides

X. Wang, X. Tang, L. Shi, X. Chen and X. Liu, J. Mater. Chem. C, 2024, 12, 9158 DOI: 10.1039/D4TC00511B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements