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Abstract
This paper reports the synthesis and characterization of yttrium hydrides (YH3, YH4, YH6, YH8) under high pressure, revealing superconductivity in the Im-3m YH6 and P63/mmc YH8 phases with maximum critical temperatures (Tc) of ~220 K at 183 GPa and ~243 K at 201 GPa, respectively. The study also investigates the discrepancies between theoretical predictions and experimental data for the yttrium-hydrogen system, finding that the predicted high-Tc phase Fm-3m YH10 was not observed.
Publisher
Nature Communications
Published On
Aug 20, 2021
Authors
Panpan Kong, Vasily S. Minkov, Mikhail A. Kuzovnikov, Alexander P. Drozdov, Stanislav P. Besedin, Shirin Mozaffari, Luis Balicas, Fedor Fedorovich Balakirev, Vitali B. Prakapenka, Stella Chariton, Dmitry A. Knyazev, Eran Greenberg, Mikhail I. Eremets
Tags
Yttrium hydrides
Superconductivity
High pressure
Critical temperature
Theoretical predictions

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