Universal diamond edge Raman scale to 0.5 terapascal and implications for the metallization of hydrogen.

Autor: Eremets MI; Max Planck Institute for Chemistry, Hahn Meitner Weg 1, Mainz, 55128, Germany. m.eremets@mpic.de., Minkov VS; Max Planck Institute for Chemistry, Hahn Meitner Weg 1, Mainz, 55128, Germany., Kong PP; Max Planck Institute for Chemistry, Hahn Meitner Weg 1, Mainz, 55128, Germany., Drozdov AP; Max Planck Institute for Chemistry, Hahn Meitner Weg 1, Mainz, 55128, Germany., Chariton S; Center for Advanced Radiation Sources, University of Chicago, 5640 South Ellis Avenue, Chicago, IL, 60637, USA., Prakapenka VB; Center for Advanced Radiation Sources, University of Chicago, 5640 South Ellis Avenue, Chicago, IL, 60637, USA.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 Feb 17; Vol. 14 (1), pp. 907. Date of Electronic Publication: 2023 Feb 17.
DOI: 10.1038/s41467-023-36429-9
Abstrakt: The recent progress in generating static pressures up to terapascal values opens opportunities for studying novel materials with unusual properties, such as metallization of hydrogen and high-temperature superconductivity. However, an evaluation of pressure above ~0.3 terapascal is a challenge. We report a universal high-pressure scale up to ~0.5 terapascal, which is based on the shift of the Raman edge of stressed diamond anvils correlated with the equation of state of Au and does not require an additional pressure sensor. According to the new scale, the pressure values are substantially lower by 20% at ~0.5 terapascal compared to the extrapolation of the existing scales. We compare the available data of H 2 at the highest static pressures. We show that the onset of the proposed metallization of molecular hydrogen reported by different groups is consistent when corrected with the new scale and can be compared with various theoretical predictions.
(© 2023. The Author(s).)
Databáze: MEDLINE
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