Dresden 2026 – scientific programme
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DS: Fachverband Dünne Schichten
DS 17: Focus Session: High-Temperature Superconductivity in Hydride Materials at High Pressures (joint session TT/DS)
DS 17.8: Talk
Thursday, March 12, 2026, 18:15–18:30, HSZ/0003
Search for Room-temperature Superconductivity in the La-Sc-H System — •Dmitrii V. Semenok1, Ivan A. Troyan2, Di Zhou1, and Viktor V. Struzhkin1, 3 — 1Center for High Pressure Science & Technology Advanced Research, Bldg. 8E, 10 Xibeiwang East Rd, Beijing, 100193, China — 2private — 3Center for High Pressure Science & Technology Advanced Research, 1690 Cailun Rd, Bldg 6, Shanghai 201203, China
One of the highlights of 2025 in the field of hydride superconductivity was the announcement of the experimental discovery of room-temperature superconductivity in the fully ordered ternary polyhydride P6/mmm-LaSc2H24 at around 260 GPa [1]. We performed a DFT analysis of intermetallic compound formation in the La-Sc system with a view to modifying the synthetic procedure, and calculated parameters of the superconducting state of the isostructural P6/mmm-La3H24 and P6/mmm-Sc3H24 at 300 GPa. Attempts to experimentally reproduce the synthesis of LaSc2H24 from the LaSc2 alloy (with a careful selection of the homogeneity region of this alloy’s composition) at 264-280 GPa have not yet resulted in the detection of any traces of superconductivity between 255 K and 295 K in the corresponding hydride. In my report, I will show the results of additional experimental attempts to reproduce [1], planned for January-February 2026.
[1] Y. Song et al., arXiv: 2510.01273 (2025).
Keywords: LaSc2H24; superhydrides; superconductivity; room-temperature superconductivity; high pressure