Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 조준형 | - |
dc.date.accessioned | 2022-03-08T01:52:35Z | - |
dc.date.available | 2022-03-08T01:52:35Z | - |
dc.date.issued | 2020-06 | - |
dc.identifier.citation | PHYSICAL REVIEW B, v. 101, no. 21, article no. 214501 | en_US |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.issn | 2469-9969 | - |
dc.identifier.uri | https://journals.aps.org/prb/abstract/10.1103/PhysRevB.101.214501 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/168909 | - |
dc.description.abstract | Recently, the discovery of room-temperature superconductivity (SC) was experimentally realized in the fcc phase of LaH10 under megabar pressure. Specifically, the isotope effect of T-c was measured by the replacement of hydrogen (H) with deuterium (D), demonstrating a driving role of phonons in the observed room-temperature SC. Herein, based on the first-principles calculations within the harmonic approximation, we reveal that (i) the identical electron-phonon coupling constants of fcc LaH(10 )and LaD10 decrease monotonously with increasing pressure and (ii) the isotope effect of T-c is nearly proportional to M-alpha (M: ionic mass) with alpha approximate to 0.465, irrespective of pressure. The predicted value of alpha agrees well with the experimental one (alpha = 0.46) measured at around 150 GPa. Thus, our findings provide a theoretical confirmation of the conventional electron-phonon coupling mechanism in a recently discovered room-temperature superconductor of compressed LaH10. | en_US |
dc.description.sponsorship | A.P.D. acknowledges the financial support from the Polish National Science Centre (NCN) under Grant No. 2016/23/D/ST3/02109 and from the Polish Ministry of Science and Higher Education under the scholarship for young outstanding scientists No. 406/STYP/13/2018. J.H.C. acknowledges the National Research Foundation of Korea (NRF) grant funded by the Korean Government (Grants No. 2019R1A2C1002975, No. 2016K1A4A3914691, and No. 2015M3D1A1070609). Y.L. acknowledges funding from the National Natural Science Foundation of China under Grant No. 11722433, the Six Talent Peaks Project of Jiangsu Province. | en_US |
dc.language.iso | en | en_US |
dc.publisher | AMER PHYSICAL SOC | en_US |
dc.subject | CRYSTAL-STRUCTURE | en_US |
dc.subject | HYDROGEN | en_US |
dc.title | Isotope effect in superconducting lanthanum hydride under high compression | en_US |
dc.type | Article | en_US |
dc.relation.no | 0 | - |
dc.relation.volume | 101 | - |
dc.identifier.doi | 10.1103/PhysRevB.101.214501 | - |
dc.relation.page | 214501-214501 | - |
dc.relation.journal | PHYSICAL REVIEW B | - |
dc.contributor.googleauthor | Durajski, Artur P. | - |
dc.contributor.googleauthor | Szczesniak, Radoslaw | - |
dc.contributor.googleauthor | Li, Yinwei | - |
dc.contributor.googleauthor | Wang, Chongze | - |
dc.contributor.googleauthor | Cho, Jun-Hyung | - |
dc.relation.code | 2020052321 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF NATURAL SCIENCES[S] | - |
dc.sector.department | DEPARTMENT OF PHYSICS | - |
dc.identifier.pid | chojh | - |
dc.identifier.orcid | https://orcid.org/0000-0002-1785-1835 | - |
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