Superconductivity at 215 K in lanthanum hydride at high pressures

A. P. Drozdov; V. S. Minkov; S. P. Besedin; P. P. Kong; M. A. Kuzovnikov; D. A. Knyazev; M. I. Eremets

Superconductivity at 215 K in lanthanum hydride at high pressures

Superconductivity 2018-08-22 v1 Materials Science

Authors: A. P. Drozdov , V. S. Minkov , S. P. Besedin , P. P. Kong , M. A. Kuzovnikov , D. A. Knyazev , M. I. Eremets

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.

Keywords

high-pressure superconductivity lanthanum hydride record critical temperature hydrides sodalite-like structure

Cite

@article{arxiv.1808.07039,
  title  = {Superconductivity at 215 K in lanthanum hydride at high pressures},
  author = {A. P. Drozdov and V. S. Minkov and S. P. Besedin and P. P. Kong and M. A. Kuzovnikov and D. A. Knyazev and M. I. Eremets},
  journal= {arXiv preprint arXiv:1808.07039},
  year   = {2018}
}

Superconductivity at 215 K in lanthanum hydride at high pressures

Abstract

Keywords

Cite

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