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  • Purans, J., et al. (author)
  • Local electronic structure rearrangements and strong anharmonicity in YH3 under pressures up to 180 GPa
  • 2021
  • In: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 12:1
  • Journal article (peer-reviewed)abstract
    • The discovery of superconductivity above 250 K at high pressure in LaH10 and the prediction of overcoming the room temperature threshold for superconductivity in YH10 urge for a better understanding of hydrogen interaction mechanisms with the heavy atom sublattice in metal hydrides under high pressure at the atomic scale. Here we use locally sensitive X-ray absorption fine structure spectroscopy (XAFS) to get insight into the nature of phase transitions and the rearrangements of local electronic and crystal structure in archetypal metal hydride YH3 under pressure up to 180 GPa. The combination of the experimental methods allowed us to implement a multiscale length study of YH3: XAFS (short-range), Raman scattering (medium-range) and XRD (long-range). XANES data evidence a strong effect of hydrogen on the density of 4d yttrium states that increases with pressure and EXAFS data evidence a strong anharmonicity, manifested as yttrium atom vibrations in a double-well potential.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Kuzmin, A (1)
Purans, J (1)
Rosa, A. D. (1)
Ivanov, A. A. (1)
Menushenkov, A. P. (1)
Pascarelli, S. (1)
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Irifune, T. (1)
Besedin, S. P. (1)
Minkov, V. S. (1)
Pudza, I. (1)
Klementiev, K. V. (1)
Mathon, O. (1)
Eremets, M. I. (1)
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University
Lund University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2021 (1)

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