Stoichiometric evolutions of PH₃ under high pressure: implication for high-T _c superconducting hydrides.

ABSTRACT: The superconductivity of hydrides under high pressure has attracted a great deal of attention since the recent observation of the superconducting transition at 203 K in strongly compressed H₂S. It has been realized that the stoichiometry of hydrides might change under high pressure, which is crucial in understanding the superconducting mechanism. In this study, PH₃ was studied to understand its superconducting transition and stoichiometry under high pressure using Raman, IR and X-ray diffraction measurements, as well as theoretical calculations. PH₃ is stable below 11.7 GPa and then it starts to dehydrogenate through two dimerization processes at room temperature and pressures up to 25 GPa. Two resulting phosphorus hydrides, P₂H₄ and P

SUBMITTER: Yuan Y 

PROVIDER: S-EPMC8291478 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature