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Microscopic theory of colour in lutetium hydride
Nitrogen-doped lutetium hydride has recently been proposed as a near-ambient-conditions superconductor. Interestingly, the sample transforms from blue to pink to red as a function of pressure, but only the pink phase is claimed to be superconducting. Subsequent experimental studies have failed to re...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10646004/ https://www.ncbi.nlm.nih.gov/pubmed/37963870 http://dx.doi.org/10.1038/s41467-023-42983-z |
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author | Kim, Sun-Woo Conway, Lewis J. Pickard, Chris J. Pascut, G. Lucian Monserrat, Bartomeu |
author_facet | Kim, Sun-Woo Conway, Lewis J. Pickard, Chris J. Pascut, G. Lucian Monserrat, Bartomeu |
author_sort | Kim, Sun-Woo |
collection | PubMed |
description | Nitrogen-doped lutetium hydride has recently been proposed as a near-ambient-conditions superconductor. Interestingly, the sample transforms from blue to pink to red as a function of pressure, but only the pink phase is claimed to be superconducting. Subsequent experimental studies have failed to reproduce the superconductivity, but have observed pressure-driven colour changes including blue, pink, red, violet, and orange. However, discrepancies exist among these experiments regarding the sequence and pressure at which these colour changes occur. Given the claimed relationship between colour and superconductivity, understanding colour changes in nitrogen-doped lutetium hydride may hold the key to clarifying the possible superconductivity in this compound. Here, we present a full microscopic theory of colour in lutetium hydride, revealing that hydrogen-deficient LuH(2) is the only phase which exhibits colour changes under pressure consistent with experimental reports, with a sequence blue-violet-pink-red-orange. The concentration of hydrogen vacancies controls the precise sequence and pressure of colour changes, rationalising seemingly contradictory experiments. Nitrogen doping also modifies the colour of LuH(2) but it plays a secondary role compared to hydrogen vacancies. Therefore, we propose hydrogen-deficient LuH(2) as the key phase for exploring the superconductivity claim in the lutetium-hydrogen system. Finally, we find no phonon-mediated superconductivity near room temperature in the pink phase. |
format | Online Article Text |
id | pubmed-10646004 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-106460042023-11-14 Microscopic theory of colour in lutetium hydride Kim, Sun-Woo Conway, Lewis J. Pickard, Chris J. Pascut, G. Lucian Monserrat, Bartomeu Nat Commun Article Nitrogen-doped lutetium hydride has recently been proposed as a near-ambient-conditions superconductor. Interestingly, the sample transforms from blue to pink to red as a function of pressure, but only the pink phase is claimed to be superconducting. Subsequent experimental studies have failed to reproduce the superconductivity, but have observed pressure-driven colour changes including blue, pink, red, violet, and orange. However, discrepancies exist among these experiments regarding the sequence and pressure at which these colour changes occur. Given the claimed relationship between colour and superconductivity, understanding colour changes in nitrogen-doped lutetium hydride may hold the key to clarifying the possible superconductivity in this compound. Here, we present a full microscopic theory of colour in lutetium hydride, revealing that hydrogen-deficient LuH(2) is the only phase which exhibits colour changes under pressure consistent with experimental reports, with a sequence blue-violet-pink-red-orange. The concentration of hydrogen vacancies controls the precise sequence and pressure of colour changes, rationalising seemingly contradictory experiments. Nitrogen doping also modifies the colour of LuH(2) but it plays a secondary role compared to hydrogen vacancies. Therefore, we propose hydrogen-deficient LuH(2) as the key phase for exploring the superconductivity claim in the lutetium-hydrogen system. Finally, we find no phonon-mediated superconductivity near room temperature in the pink phase. Nature Publishing Group UK 2023-11-14 /pmc/articles/PMC10646004/ /pubmed/37963870 http://dx.doi.org/10.1038/s41467-023-42983-z Text en © The Author(s) 2023 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Kim, Sun-Woo Conway, Lewis J. Pickard, Chris J. Pascut, G. Lucian Monserrat, Bartomeu Microscopic theory of colour in lutetium hydride |
title | Microscopic theory of colour in lutetium hydride |
title_full | Microscopic theory of colour in lutetium hydride |
title_fullStr | Microscopic theory of colour in lutetium hydride |
title_full_unstemmed | Microscopic theory of colour in lutetium hydride |
title_short | Microscopic theory of colour in lutetium hydride |
title_sort | microscopic theory of colour in lutetium hydride |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10646004/ https://www.ncbi.nlm.nih.gov/pubmed/37963870 http://dx.doi.org/10.1038/s41467-023-42983-z |
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