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Superconductivity at 215 K in lanthanum hydride at high pressures

MPS-Authors
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Drozdov,  A. P.
High Pressure Group, Max Planck Institute for Chemistry, Max Planck Society;

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Minkov,  V. S.
High Pressure Group, Max Planck Institute for Chemistry, Max Planck Society;

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Besedin,  S. P.
High Pressure Group, Max Planck Institute for Chemistry, Max Planck Society;

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Kong,  P. P.
High Pressure Group, Max Planck Institute for Chemistry, Max Planck Society;

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Kuzovnikov,  M. A.
High Pressure Group, Max Planck Institute for Chemistry, Max Planck Society;

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Knyazev,  D. A.
High Pressure Group, Max Planck Institute for Chemistry, Max Planck Society;

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Eremets,  M. I.
High Pressure Group, Max Planck Institute for Chemistry, Max Planck Society;

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Citation

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.


Cite as: http://hdl.handle.net/21.11116/0000-0007-8208-D
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.