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Materials Research Express, volume 7, issue 8, pages 86001

Superconductivity of superhydride CeH10 under high pressure

Tsuppayakorn Aek Prutthipong 1
Pinsook Udomsilp 1
Li Wei 2
Ahuja Rajeev 2, 3
Bovornratanaraks T. 1
1
 
Extreme Conditions Physics Research Laboratory (ECPRL) and Physics of Energy Materials Research Unit (PEMRU), Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
Publication typeJournal Article
Publication date2020-08-01
Quartile SCImago
Q2
Quartile WOS
Q3
Impact factor2.3
ISSN20531591
Metals and Alloys
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Polymers and Plastics
Biomaterials
Abstract

A large class of metal superhydrides was found to be a conventional BCS superconductor under high pressures. In this work, we focused on cerium decahydride, CeH10. Ce is a member of the so–called lability belt in the periodic table, where the physical properties can be largely affected by pressure. It was reported and we confirmed that CeH10 can be formed with the Fm-3m structure, where a cerium atom is embedded in a H32 clathrate cage. Our phonon calculations show that it is dynamically stable at around 300 GPa onwards. We examined the evolution under pressures of the phonons, the electronic states, the Fermi surface, and the electron localization function (ELF). There exists a small van Hove singularity (vHs), and it gradually moves to below the Fermi surface as pressure increases. This behaviour associating with the reducing value of the electron-phonon coupling strength (λ), causes the superconductivity transition temperature (Tc) to gradually reduce under pressures. The maximum T c is 45 K at 300 GPa.

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GOST Copy
Tsuppayakorn Aek P. et al. Superconductivity of superhydride CeH10 under high pressure // Materials Research Express. 2020. Vol. 7. No. 8. p. 86001.
GOST all authors (up to 50) Copy
Tsuppayakorn Aek P., Pinsook U., Li W., Ahuja R., Bovornratanaraks T. Superconductivity of superhydride CeH10 under high pressure // Materials Research Express. 2020. Vol. 7. No. 8. p. 86001.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1088/2053-1591/ababc2
UR - https://doi.org/10.1088%2F2053-1591%2Fababc2
TI - Superconductivity of superhydride CeH10 under high pressure
T2 - Materials Research Express
AU - Tsuppayakorn Aek, Prutthipong
AU - Pinsook, Udomsilp
AU - Li, Wei
AU - Ahuja, Rajeev
AU - Bovornratanaraks, T.
PY - 2020
DA - 2020/08/01 00:00:00
PB - IOP Publishing
SP - 86001
IS - 8
VL - 7
SN - 2053-1591
ER -
BibTex |
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BibTex Copy
@article{2020_Tsuppayakorn Aek
author = {Prutthipong Tsuppayakorn Aek and Udomsilp Pinsook and Wei Li and Rajeev Ahuja and T. Bovornratanaraks},
title = {Superconductivity of superhydride CeH10 under high pressure},
journal = {Materials Research Express},
year = {2020},
volume = {7},
publisher = {IOP Publishing},
month = {aug},
url = {https://doi.org/10.1088%2F2053-1591%2Fababc2},
number = {8},
pages = {86001},
doi = {10.1088/2053-1591/ababc2}
}
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Tsuppayakorn Aek, Prutthipong, et al. “Superconductivity of superhydride CeH10 under high pressure.” Materials Research Express, vol. 7, no. 8, Aug. 2020, p. 86001. https://doi.org/10.1088%2F2053-1591%2Fababc2.
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