2018/08/21 by A. P. Drozdov, Vasily S. Minkov, Drozdov, A. P. +11 · 1 citation
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Advanced Chemical Physics Studies #FOS: Physical sciences #High-pressure geophysics and materials #Materials Science (cond-mat.mtrl-sci) #Nuclear Materials and Properties #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.1808.07039
openalex publication_date 2018/08/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.