Phase Diagram and High-Temperature Superconductivity of Compressed Selenium Hydrides

Recent discovery of high-temperature superconductivity (T(c) = 190 K) in sulfur hydrides at megabar pressures breaks the traditional belief on the T(c) limit of 40 K for conventional superconductors, and opens up the doors in searching new high-temperature superconductors in compounds made up of lig...

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Publicado no:Sci Rep
Main Authors: Zhang, Shoutao, Wang, Yanchao, Zhang, Jurong, Liu, Hanyu, Zhong, Xin, Song, Hai-Feng, Yang, Guochun, Zhang, Lijun, Ma, Yanming
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Idioma:Inglês
Publicado em: Nature Publishing Group 2015
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Acesso em linha:https://ncbi.nlm.nih.gov/pmc/articles/PMC4614537/
https://ncbi.nlm.nih.gov/pubmed/26490223
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1038/srep15433
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spelling pubmed-46145372015-10-29 Phase Diagram and High-Temperature Superconductivity of Compressed Selenium Hydrides Zhang, Shoutao Wang, Yanchao Zhang, Jurong Liu, Hanyu Zhong, Xin Song, Hai-Feng Yang, Guochun Zhang, Lijun Ma, Yanming Sci Rep Article Recent discovery of high-temperature superconductivity (T(c) = 190 K) in sulfur hydrides at megabar pressures breaks the traditional belief on the T(c) limit of 40 K for conventional superconductors, and opens up the doors in searching new high-temperature superconductors in compounds made up of light elements. Selenium is a sister and isoelectronic element of sulfur, with a larger atomic core and a weaker electronegativity. Whether selenium hydrides share similar high-temperature superconductivity remains elusive, but it is a subject of considerable interest. First-principles swarm structure predictions are performed in an effort to seek for energetically stable and metallic selenium hydrides at high pressures. We find the phase diagram of selenium hydrides is rather different from its sulfur analogy, which is indicated by the emergence of new phases and the change of relative stabilities. Three stable and metallic species with stoichiometries of HSe(2), HSe and H(3)Se are identified above ~120 GPa and they all exhibit superconductive behaviors, of which the hydrogen-rich HSe and H(3)Se phases show high T(c) in the range of 40–110 K. Our simulations established the high-temperature superconductive nature of selenium hydrides and provided useful route for experimental verification. Nature Publishing Group 2015-10-22 /pmc/articles/PMC4614537/ /pubmed/26490223 http://dx.doi.org/10.1038/srep15433 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
institution US NLM
collection PubMed Central
language Inglês
format Artigo
topic Article
spellingShingle Article
Zhang, Shoutao
Wang, Yanchao
Zhang, Jurong
Liu, Hanyu
Zhong, Xin
Song, Hai-Feng
Yang, Guochun
Zhang, Lijun
Ma, Yanming
Phase Diagram and High-Temperature Superconductivity of Compressed Selenium Hydrides
description Recent discovery of high-temperature superconductivity (T(c) = 190 K) in sulfur hydrides at megabar pressures breaks the traditional belief on the T(c) limit of 40 K for conventional superconductors, and opens up the doors in searching new high-temperature superconductors in compounds made up of light elements. Selenium is a sister and isoelectronic element of sulfur, with a larger atomic core and a weaker electronegativity. Whether selenium hydrides share similar high-temperature superconductivity remains elusive, but it is a subject of considerable interest. First-principles swarm structure predictions are performed in an effort to seek for energetically stable and metallic selenium hydrides at high pressures. We find the phase diagram of selenium hydrides is rather different from its sulfur analogy, which is indicated by the emergence of new phases and the change of relative stabilities. Three stable and metallic species with stoichiometries of HSe(2), HSe and H(3)Se are identified above ~120 GPa and they all exhibit superconductive behaviors, of which the hydrogen-rich HSe and H(3)Se phases show high T(c) in the range of 40–110 K. Our simulations established the high-temperature superconductive nature of selenium hydrides and provided useful route for experimental verification.
author Zhang, Shoutao
Wang, Yanchao
Zhang, Jurong
Liu, Hanyu
Zhong, Xin
Song, Hai-Feng
Yang, Guochun
Zhang, Lijun
Ma, Yanming
author_facet Zhang, Shoutao
Wang, Yanchao
Zhang, Jurong
Liu, Hanyu
Zhong, Xin
Song, Hai-Feng
Yang, Guochun
Zhang, Lijun
Ma, Yanming
author_sort Zhang, Shoutao
title Phase Diagram and High-Temperature Superconductivity of Compressed Selenium Hydrides
title_short Phase Diagram and High-Temperature Superconductivity of Compressed Selenium Hydrides
title_full Phase Diagram and High-Temperature Superconductivity of Compressed Selenium Hydrides
title_fullStr Phase Diagram and High-Temperature Superconductivity of Compressed Selenium Hydrides
title_full_unstemmed Phase Diagram and High-Temperature Superconductivity of Compressed Selenium Hydrides
title_sort phase diagram and high-temperature superconductivity of compressed selenium hydrides
publisher Nature Publishing Group
container_title Sci Rep
publishDate 2015
url https://ncbi.nlm.nih.gov/pmc/articles/PMC4614537/
https://ncbi.nlm.nih.gov/pubmed/26490223
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1038/srep15433
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