Superconductivity at 215 K in lanthanum hydride at high pressures

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

Superconductivity at 215 K in lanthanum hydride at high pressures

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arxiv 1808.07039 v1 pith:RU4NZVJL submitted 2018-08-21 cond-mat.supr-con cond-mat.mtrl-sci

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 This is my paper

classification cond-mat.supr-con cond-mat.mtrl-sci

keywords lanthanumtemperaturehigherhydridehydridespressuresuperconductingsuperconductivity

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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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Cited by 1 Pith paper

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Stability Analysis of Superconductivity in $\textit{P6/mmm}$-LaSc$_2$H$_{24}$ and its Experimental Reproducibility from La-Sc Alloys
cond-mat.supr-con 2026-05 unverdicted novelty 4.0

Theoretical analysis finds LaSc2H24 at the stability edge with Tc > 300 K via tetrahedral method, but experiments from La-Sc alloys yield no superconductivity or the target phase.