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  Superconductivity at 215 K in lanthanum hydride at high pressures

Drozdov, A. P., Minkov, V. S., Besedin, S. P., Kong, P. P., Kuzovnikov, M. A., Knyazev, D. A., et al. (2018). Superconductivity at 215 K in lanthanum hydride at high pressures.

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 Creators:
Drozdov, A. P.1, Author              
Minkov, V. S.1, Author              
Besedin, S. P.1, Author              
Kong, P. P.1, Author              
Kuzovnikov, M. A.1, Author              
Knyazev, D. A.1, Author              
Eremets, M. I.1, Author              
Affiliations:
1High Pressure Group, Max Planck Institute for Chemistry, Max Planck Society, ou_1826289              

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 Abstract: We synthesized lanthanum hydride (LaHx) by laser heating of lanthanum in hydrogen atmosphere at pressure P = 170 GPa. The sample shows a superconducting step at 209 K and 170 GPa and temperature dependence of resistance. By releasing the pressure to 150 GPa, the superconducting transition temperature Tc increases to 215 K - the record Tc. This finding supports a way of achieving Tc higher than the one in H3S (203 K) in hydrides with sodalite-like structures, first proposed for CaH6 (Tc=245 K) and later for yttrium and lanthanum hydrides where higher, room temperature superconductivity is expected.

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Language(s): eng - English
 Dates: 2018-08-21
 Publication Status: Published online
 Pages: -
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 Rev. Type: -
 Identifiers: arXiv: 1808.07039
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