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Название: | The electron-phonon coupling constant, Fermi temperature and unconventional superconductivity in the carbonaceous sulfur hydride 190 K superconductor |
Авторы: | Talantsev, E. F. |
Дата публикации: | 2021 |
Издатель: | IOP Publishing Ltd |
Библиографическое описание: | Talantsev E. F. The electron-phonon coupling constant, Fermi temperature and unconventional superconductivity in the carbonaceous sulfur hydride 190 K superconductor / E. F. Talantsev. — DOI 10.1088/1361-6668/abd28e // Superconductor Science and Technology. — 2021. — Vol. 34. — Iss. 3. — 034001. |
Аннотация: | Recently, Snider et al (2020 Nature 586 373) reported on the observation of superconductivity in highly compressed carbonaceous sulfur hydride, H x (S,C) y . The highest critical temperature in H x (S,C) y exceeds the previous record of T c = 280 K by 5 K, as reported by Somayazulu et al (2019 Phys. Rev. Lett. 122 027001) for highly compressed LaH10. In this paper, we analyze experimental temperature-dependent magnetoresistance data, R(T,B), reported by Snider et al. The analysis shows that H x (S,C) y compound exhibited T c = 190 K (P = 210 GPa), has the electron-phonon coupling constant λ e-ph = 2.0 and the ratio of critical temperature, T c, to the Fermi temperature, T F, in the range of 0.011 T c/T F 0.018. These deduced values are very close to the ones reported for H3S at P = 155-165 GPa (Drozdov et al 2015 Nature 525 73). This means that in all considered scenarios the carbonaceous sulfur hydride 190 K superconductor falls into the unconventional superconductor band in the Uemura plot, where all other highly compressed super-hydride/deuterides are located. It should be noted that our analysis shows that all raw R(T,B) data sets for H x (S,C) y samples, for which Snider et al (2020 Nature 586 373) reported T c > 200 K, cannot be characterized as reliable data sources. Thus, independent experimental confirmation/disproof for high-T c values in the carbonaceous sulfur hydride are required. © 2021 IOP Publishing Ltd. |
Ключевые слова: | ELECTRON-PHONON COUPLING CONSTANT HIGH-PRESSURE SUPERCONDUCTORS HYDROGEN-BASED SUPERCONDUCTORS ROOM-TEMPERATURE SUPERCONDUCTORS UPPER CRITICAL FIELD ELECTRON CORRELATIONS HYDRIDES HYDROGEN SULFIDE SUPERCONDUCTING MATERIALS TEMPERATURE CRITICAL TEMPERATURES ELECTRON-PHONON COUPLING CONSTANT EXPERIMENTAL CONFIRMATION FERMI TEMPERATURE SUPERHYDRIDES TEMPERATURE DEPENDENT UNCONVENTIONAL SUPERCONDUCTIVITY UNCONVENTIONAL SUPERCONDUCTORS ELECTRON-PHONON INTERACTIONS |
URI: | http://elar.urfu.ru/handle/10995/103053 |
Условия доступа: | info:eu-repo/semantics/openAccess |
Идентификатор РИНЦ: | 46759638 |
Идентификатор SCOPUS: | 85102150417 |
Идентификатор WOS: | 000613655100001 |
Идентификатор PURE: | 20907854 |
ISSN: | 9532048 |
DOI: | 10.1088/1361-6668/abd28e |
Располагается в коллекциях: | Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC |
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Файл | Описание | Размер | Формат | |
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2-s2.0-85102150417.pdf | 616,62 kB | Adobe PDF | Просмотреть/Открыть |
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