{"id":"doi:10.1038/s41467-021-25372-2","kind":"article","title":"Superconductivity up to 243 K in the yttrium-hydrogen system under high pressure","authors":["P. P. Kong","Vasily S. Minkov","Mikhail A. Kuzovnikov","Alexander P. Drozdov","Stanislav P. Besedin","Shirin Mozaffari","Luis Balicas","Fedor Balakirev","Vitali B. Prakapenka","Stella Chariton","Dmitry A. Knyazev","Eran Greenberg","M. I. Eremets"],"author_count":13,"year":2021,"published":"2021-08-20","venue":"Nature Communications","cited_by":534,"doi":"10.1038/s41467-021-25372-2","arxiv_id":null,"nct_id":null,"source_url":"https://doi.org/10.1038/s41467-021-25372-2","archive_url":"https://space-kitty.com/papers/doi:10.1038/s41467-021-25372-2","updated":null,"pmid":"34417471","pmcid":null,"openalex_id":"W3194629154","pdf_url":"https://www.nature.com/articles/s41467-021-25372-2.pdf","abstract":"Abstract The discovery of superconducting H 3 S with a critical temperature T c ∼200 K opened a door to room temperature superconductivity and stimulated further extensive studies of hydrogen-rich compounds stabilized by high pressure. Here, we report a comprehensive study of the yttrium-hydrogen system with the highest predicted T c s among binary compounds and discuss the contradictions between different theoretical calculations and experimental data. We synthesized yttrium hydrides with the compositions of YH 3 , YH 4 , YH 6 and YH 9 in a diamond anvil cell and studied their crystal structures, electrical and magnetic transport properties, and isotopic effects. We found superconductivity in the Im-3m YH 6 and P6 3 /mmc YH 9 phases with maximal T c s of ∼220 K at 183 GPa and ∼243 K at 201 GPa, respectively. Fm-3m YH 10 with the highest predicted T c > 300 K was not observed in our experiments, and instead, YH 9 was found to be the hydrogen-richest yttrium hydride in the studied pressure and temperature range up to record 410 GPa and 2250 K.","abstract_license":"CC-BY (publisher license, via OpenAlex)","license":"cc-by","is_open_access":true,"retracted":false,"peer_reviewed":null,"categories":["High-pressure geophysics and materials"],"details":null,"provenance":"openalex","attribution":"Abstract of \"Superconductivity up to 243 K in the yttrium-hydrogen system under high pressure\" by P. P. Kong, Vasily S. Minkov, Mikhail A. Kuzovnikov et al., https://doi.org/10.1038/s41467-021-25372-2, used under its Creative Commons Attribution license (CC-BY); markup removed, otherwise unmodified.","topics":[{"slug":"hydride-superconductors","name":"Superconducting Hydrides Under Pressure","domain_slug":"superconductivity"}],"cited_in_dossiers":[{"slug":"hydride-superconductors","title":"Superconducting Hydrides Under Pressure: State of the Field (October 2026)","url":"https://space-kitty.com/dossiers/hydride-superconductors"}]}