Possible high-T C superconductivity at 50 GPa in sodium hydride with clathrate structure
Ambient-pressure room-temperature superconductivity is one ultimate goal of science, for it will bring worldwide revolutionary changes in all kinds of technology. Several room temperature and near room temperature hydride superconductors at ultra high pressure (≳100 GPa) have been predicted theoreti...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/ac1df3 |
| _version_ | 1797750111100469248 |
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| author | Chin-Hsuan Chen Angus Huang C C Tsuei Horng-Tay Jeng |
| author_facet | Chin-Hsuan Chen Angus Huang C C Tsuei Horng-Tay Jeng |
| author_sort | Chin-Hsuan Chen |
| collection | DOAJ |
| description | Ambient-pressure room-temperature superconductivity is one ultimate goal of science, for it will bring worldwide revolutionary changes in all kinds of technology. Several room temperature and near room temperature hydride superconductors at ultra high pressure (≳100 GPa) have been predicted theoretically. In particular, the hydrogen sulfide (H _3 S) with T _C ≃ 203 K at 200 GPa has soon been confirmed experimentally, establishing a milestone toward room temperature superconductivity. However, high- T _C superconductors at lower pressure (≲100 GPa) have not been reported before. In this work, we present high- T _C superconductivity of 180 K at a relatively low pressure of 50 GPa in sodium hydride clathrate structure NaH _6 . The T _C can be raised up to 206 K at 100 GPa, similar to the T _C of H _3 S but at a much lower pressure. At 200 GPa, it reaches the highest T _C of 210 K, slightly higher than that of H _3 S. The strong electron–phonon coupling strength given by the T _2 _g phonon mode at Γ point plays the key role in superconductivity. Our work demonstrates theoretically that hydrides could stabilize at a relatively low pressure and host high- T _C superconductivity. |
| first_indexed | 2024-03-12T16:27:57Z |
| format | Article |
| id | doaj.art-e283292f0c6c4d099a7ef979bbb6ec36 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:27:57Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-e283292f0c6c4d099a7ef979bbb6ec362023-08-08T15:38:30ZengIOP PublishingNew Journal of Physics1367-26302021-01-0123909300710.1088/1367-2630/ac1df3Possible high-T C superconductivity at 50 GPa in sodium hydride with clathrate structureChin-Hsuan Chen0Angus Huang1C C Tsuei2Horng-Tay Jeng3Department of Physics, National Tsing Hua University , Hsinchu 30013, TaiwanDepartment of Physics, National Tsing Hua University , Hsinchu 30013, TaiwanIBM T.J. Watson Research Center , Yorktown Heights, NY 10598, United States of America; Institute of Physics , Academia Sinica, Taipei 11529, TaiwanDepartment of Physics, National Tsing Hua University , Hsinchu 30013, Taiwan; Institute of Physics , Academia Sinica, Taipei 11529, Taiwan; Physics Division, National Center for Theoretical Sciences , Hsinchu 30013, TaiwanAmbient-pressure room-temperature superconductivity is one ultimate goal of science, for it will bring worldwide revolutionary changes in all kinds of technology. Several room temperature and near room temperature hydride superconductors at ultra high pressure (≳100 GPa) have been predicted theoretically. In particular, the hydrogen sulfide (H _3 S) with T _C ≃ 203 K at 200 GPa has soon been confirmed experimentally, establishing a milestone toward room temperature superconductivity. However, high- T _C superconductors at lower pressure (≲100 GPa) have not been reported before. In this work, we present high- T _C superconductivity of 180 K at a relatively low pressure of 50 GPa in sodium hydride clathrate structure NaH _6 . The T _C can be raised up to 206 K at 100 GPa, similar to the T _C of H _3 S but at a much lower pressure. At 200 GPa, it reaches the highest T _C of 210 K, slightly higher than that of H _3 S. The strong electron–phonon coupling strength given by the T _2 _g phonon mode at Γ point plays the key role in superconductivity. Our work demonstrates theoretically that hydrides could stabilize at a relatively low pressure and host high- T _C superconductivity.https://doi.org/10.1088/1367-2630/ac1df3superconductivitysodium hydrideclathrate structurepressureelectron–phonon couplingdensity functional perturbation theory |
| spellingShingle | Chin-Hsuan Chen Angus Huang C C Tsuei Horng-Tay Jeng Possible high-T C superconductivity at 50 GPa in sodium hydride with clathrate structure New Journal of Physics superconductivity sodium hydride clathrate structure pressure electron–phonon coupling density functional perturbation theory |
| title | Possible high-T C superconductivity at 50 GPa in sodium hydride with clathrate structure |
| title_full | Possible high-T C superconductivity at 50 GPa in sodium hydride with clathrate structure |
| title_fullStr | Possible high-T C superconductivity at 50 GPa in sodium hydride with clathrate structure |
| title_full_unstemmed | Possible high-T C superconductivity at 50 GPa in sodium hydride with clathrate structure |
| title_short | Possible high-T C superconductivity at 50 GPa in sodium hydride with clathrate structure |
| title_sort | possible high t c superconductivity at 50 gpa in sodium hydride with clathrate structure |
| topic | superconductivity sodium hydride clathrate structure pressure electron–phonon coupling density functional perturbation theory |
| url | https://doi.org/10.1088/1367-2630/ac1df3 |
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