Hydrogen sulfide at high pressure: Change in stoichiometry

Alexander F. Goncharov, Sergey S. Lobanov, Ivan Kruglov, Xiao Miao Zhao, Xiao Jia Chen, Artem R. Oganov, Zuzana Konôpková, Vitali B. Prakapenka

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)

Abstract

Hydrogen sulfide (H2S) was studied by x-ray synchrotron diffraction and Raman spectroscopy up to 150 GPa at 180-295 K and by quantum-mechanical variable-composition evolutionary simulations. The experiments show that H2S becomes unstable with respect to formation of compounds with different structure and composition, including Cccm and a body-centered cubic like (R3m or Im-3m) H3S, the latter one predicted previously to show a record-high superconducting transition temperature, a Tc of 203 K. These experiments provide experimental ground for understanding of this record-high Tc. The experimental results are supported by theoretical structure searches that suggest the stability of H3S, H4S3, H5S8, H3S5, and HS2 compounds that have not been reported previously at elevated pressures.

Original languageEnglish
Article number174105
JournalPhysical Review B
Volume93
Issue number17
DOIs
Publication statusPublished - 10 May 2016

Fingerprint

Dive into the research topics of 'Hydrogen sulfide at high pressure: Change in stoichiometry'. Together they form a unique fingerprint.

Cite this