Pressure-induced hydride superconductors above 200 K

Although it was proposed many years ago that compressed hydrogen should be a high-temperature superconductor, the goal of room-temperature superconductivity has so far remained out of reach. However, the successful synthesis of the theoretically predicted hydrides H3S and LaH10 with high superconduc...

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Autores principales:	Xiaohua Zhang, Yaping Zhao, Fei Li, Guochun Yang
Formato:	article
Lenguaje:	EN
Publicado:	AIP Publishing LLC 2021
Materias:	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/6f62f68a0d0045d5a661ecd8d60c68f2
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spelling	oai:doaj.org-article:6f62f68a0d0045d5a661ecd8d60c68f22021-12-01T18:51:44ZPressure-induced hydride superconductors above 200 K2468-080X10.1063/5.0065287https://doaj.org/article/6f62f68a0d0045d5a661ecd8d60c68f22021-11-01T00:00:00Zhttp://dx.doi.org/10.1063/5.0065287https://doaj.org/toc/2468-080XAlthough it was proposed many years ago that compressed hydrogen should be a high-temperature superconductor, the goal of room-temperature superconductivity has so far remained out of reach. However, the successful synthesis of the theoretically predicted hydrides H3S and LaH10 with high superconducting transition temperatures TC provides clear guidance for achieving this goal. The existence of these superconducting hydrides also confirms the utility of theoretical predictions in finding high-TC superconductors. To date, numerous hydrides have been studied theoretically or experimentally, especially binary hydrides. Interestingly, some of them exhibit superconductivity above 200 K. To gain insight into these high-TC hydrides (>200 K) and facilitate further research, we summarize their crystal structures, bonding features, and electronic properties, as well as their superconducting mechanism. Based on hydrogen structural motifs, covalent H3S with isolated hydrogen and several clathrate superhydrides (LaH10, YH9, and CaH6) are highlighted. Other predicted hydrides with various H-cages and two-dimensional H motifs are also discussed. Finally, we present a systematic discussion of the common features, current problems, and future challenges of these high-TC hydrides.Xiaohua ZhangYaping ZhaoFei LiGuochun YangAIP Publishing LLCarticleNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENMatter and Radiation at Extremes, Vol 6, Iss 6, Pp 068201-068201-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Xiaohua Zhang Yaping Zhao Fei Li Guochun Yang Pressure-induced hydride superconductors above 200 K
description	Although it was proposed many years ago that compressed hydrogen should be a high-temperature superconductor, the goal of room-temperature superconductivity has so far remained out of reach. However, the successful synthesis of the theoretically predicted hydrides H3S and LaH10 with high superconducting transition temperatures TC provides clear guidance for achieving this goal. The existence of these superconducting hydrides also confirms the utility of theoretical predictions in finding high-TC superconductors. To date, numerous hydrides have been studied theoretically or experimentally, especially binary hydrides. Interestingly, some of them exhibit superconductivity above 200 K. To gain insight into these high-TC hydrides (>200 K) and facilitate further research, we summarize their crystal structures, bonding features, and electronic properties, as well as their superconducting mechanism. Based on hydrogen structural motifs, covalent H3S with isolated hydrogen and several clathrate superhydrides (LaH10, YH9, and CaH6) are highlighted. Other predicted hydrides with various H-cages and two-dimensional H motifs are also discussed. Finally, we present a systematic discussion of the common features, current problems, and future challenges of these high-TC hydrides.
format	article
author	Xiaohua Zhang Yaping Zhao Fei Li Guochun Yang
author_facet	Xiaohua Zhang Yaping Zhao Fei Li Guochun Yang
author_sort	Xiaohua Zhang
title	Pressure-induced hydride superconductors above 200 K
title_short	Pressure-induced hydride superconductors above 200 K
title_full	Pressure-induced hydride superconductors above 200 K
title_fullStr	Pressure-induced hydride superconductors above 200 K
title_full_unstemmed	Pressure-induced hydride superconductors above 200 K
title_sort	pressure-induced hydride superconductors above 200 k
publisher	AIP Publishing LLC
publishDate	2021
url	https://doaj.org/article/6f62f68a0d0045d5a661ecd8d60c68f2
work_keys_str_mv	AT xiaohuazhang pressureinducedhydridesuperconductorsabove200k AT yapingzhao pressureinducedhydridesuperconductorsabove200k AT feili pressureinducedhydridesuperconductorsabove200k AT guochunyang pressureinducedhydridesuperconductorsabove200k
_version_	1718404697878953984

Pressure-induced hydride superconductors above 200 K

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