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High-temperature superconductivity on the verge of a structural instability in lanthanum superhydride

The possibility of high, room-temperature superconductivity was predicted for metallic hydrogen in the 1960s. However, metallization and superconductivity of hydrogen are yet to be unambiguously demonstrated and may require pressures as high as 5 million atmospheres. Rare earth based “superhydrides”...

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Autores principales: Sun, Dan, Minkov, Vasily S., Mozaffari, Shirin, Sun, Ying, Ma, Yanming, Chariton, Stella, Prakapenka, Vitali B., Eremets, Mikhail I., Balicas, Luis, Balakirev, Fedor F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8617267/
https://www.ncbi.nlm.nih.gov/pubmed/34824193
http://dx.doi.org/10.1038/s41467-021-26706-w
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author Sun, Dan
Minkov, Vasily S.
Mozaffari, Shirin
Sun, Ying
Ma, Yanming
Chariton, Stella
Prakapenka, Vitali B.
Eremets, Mikhail I.
Balicas, Luis
Balakirev, Fedor F.
author_facet Sun, Dan
Minkov, Vasily S.
Mozaffari, Shirin
Sun, Ying
Ma, Yanming
Chariton, Stella
Prakapenka, Vitali B.
Eremets, Mikhail I.
Balicas, Luis
Balakirev, Fedor F.
author_sort Sun, Dan
collection PubMed
description The possibility of high, room-temperature superconductivity was predicted for metallic hydrogen in the 1960s. However, metallization and superconductivity of hydrogen are yet to be unambiguously demonstrated and may require pressures as high as 5 million atmospheres. Rare earth based “superhydrides”, such as LaH(10), can be considered as a close approximation of metallic hydrogen even though they form at moderately lower pressures. In superhydrides the predominance of H-H metallic bonds and high superconducting transition temperatures bear the hallmarks of metallic hydrogen. Still, experimental studies revealing the key factors controlling their superconductivity are scarce. Here, we report the pressure and magnetic field dependence of the superconducting order observed in LaH(10). We determine that the high-symmetry high-temperature superconducting Fm-3m phase of LaH(10) can be stabilized at substantially lower pressures than previously thought. We find a remarkable correlation between superconductivity and a structural instability indicating that lattice vibrations, responsible for the monoclinic structural distortions in LaH(10), strongly affect the superconducting coupling.
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spelling pubmed-86172672021-12-10 High-temperature superconductivity on the verge of a structural instability in lanthanum superhydride Sun, Dan Minkov, Vasily S. Mozaffari, Shirin Sun, Ying Ma, Yanming Chariton, Stella Prakapenka, Vitali B. Eremets, Mikhail I. Balicas, Luis Balakirev, Fedor F. Nat Commun Article The possibility of high, room-temperature superconductivity was predicted for metallic hydrogen in the 1960s. However, metallization and superconductivity of hydrogen are yet to be unambiguously demonstrated and may require pressures as high as 5 million atmospheres. Rare earth based “superhydrides”, such as LaH(10), can be considered as a close approximation of metallic hydrogen even though they form at moderately lower pressures. In superhydrides the predominance of H-H metallic bonds and high superconducting transition temperatures bear the hallmarks of metallic hydrogen. Still, experimental studies revealing the key factors controlling their superconductivity are scarce. Here, we report the pressure and magnetic field dependence of the superconducting order observed in LaH(10). We determine that the high-symmetry high-temperature superconducting Fm-3m phase of LaH(10) can be stabilized at substantially lower pressures than previously thought. We find a remarkable correlation between superconductivity and a structural instability indicating that lattice vibrations, responsible for the monoclinic structural distortions in LaH(10), strongly affect the superconducting coupling. Nature Publishing Group UK 2021-11-25 /pmc/articles/PMC8617267/ /pubmed/34824193 http://dx.doi.org/10.1038/s41467-021-26706-w Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Sun, Dan
Minkov, Vasily S.
Mozaffari, Shirin
Sun, Ying
Ma, Yanming
Chariton, Stella
Prakapenka, Vitali B.
Eremets, Mikhail I.
Balicas, Luis
Balakirev, Fedor F.
High-temperature superconductivity on the verge of a structural instability in lanthanum superhydride
title High-temperature superconductivity on the verge of a structural instability in lanthanum superhydride
title_full High-temperature superconductivity on the verge of a structural instability in lanthanum superhydride
title_fullStr High-temperature superconductivity on the verge of a structural instability in lanthanum superhydride
title_full_unstemmed High-temperature superconductivity on the verge of a structural instability in lanthanum superhydride
title_short High-temperature superconductivity on the verge of a structural instability in lanthanum superhydride
title_sort high-temperature superconductivity on the verge of a structural instability in lanthanum superhydride
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8617267/
https://www.ncbi.nlm.nih.gov/pubmed/34824193
http://dx.doi.org/10.1038/s41467-021-26706-w
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