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arXiv · 2004.03952

Metallic Hydrogen Sublattice and Proton Mobility in Copper Hydride at High Pressure

Thomas Meier·Florian Trybel·Giacomo Criniti·Dominique Laniel·Saiana Khandarkhaeva·Egor Koemets·Timofey Fedotenko·Konstantin Glazyrin·Michael Hanfland·Gerd Steinle-Neumann·Natalia Dubrovinskaia·Leonid Dubrovinsky
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Abstract

Atomic and electronic structures of Cu2H and CuH have been investigated by high pressure NMR spectroscopy, X-ray diffraction and ab-initio calculations. Metallic Cu2H was synthesized at a pressure of 40 GPa, and semi-metallic CuH at 90 GPa, found stable up to 160 GPa. Experiments and computations suggest the formation of a metallic 1H-sublattice as well as a high 1H mobility of ~10-7 cm2/s in Cu2H. Comparison of Cu2H and FeH data suggests that deviations from Fermi gas behavior, formation of conductive hydrogen networks, and high 1H mobility could be common features of metal hydrides.

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Thomas Meier, Florian Trybel, Giacomo Criniti, Dominique Laniel, Saiana Khandarkhaeva, Egor Koemets, Timofey Fedotenko, Konstantin Glazyrin, Michael Hanfland, Gerd Steinle-Neumann, Natalia Dubrovinskaia, Leonid Dubrovinsky. 2020-04-08. Metallic Hydrogen Sublattice and Proton Mobility in Copper Hydride at High Pressure. https://doi.org/10.1103/physrevb.102.165109

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