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http://elar.urfu.ru/handle/10995/111598
Название: | The Dominance of Non-electron-phonon Charge Carrier Interaction in Highly-compressed Superhydrides |
Авторы: | Talantsev, E. F. |
Дата публикации: | 2021 |
Издатель: | IOP Publishing Ltd IOP Publishing |
Библиографическое описание: | Talantsev E. F. The Dominance of Non-electron-phonon Charge Carrier Interaction in Highly-compressed Superhydrides / E. F. Talantsev // Superconductor Science and Technology. — 2021. — Vol. 34. — Iss. 11. — 115001. |
Аннотация: | The primary mechanism governing the emergence of near-room-temperature superconductivity (NRTS) in superhydrides is widely accepted to be the electron-phonon interaction. If so, the temperature-dependent resistance, R(T), in these materials should obey the Bloch-Grüneisen (BG) equation, where the power-law exponent, p, should be equal to the exact integer value of p= 5. However, there is a well-established theoretical result showing that the pure electron-magnon interaction should be manifested by p= 3, and p= 2 is the value for pure electron-electron interaction. Here we aimed to reveal the type of charge carrier interaction in the layered transition metal dichalcogenides PdTe2, high-entropy alloy (ScZrNb)0.65[RhPd]0.35 and highly-compressed elemental boron and superhydrides H3S, LaH x, PrH9 and BaH12 by fitting the temperature-dependent resistance of these materials to the BG equation, where the power-law exponent, p, is a free-fitting parameter. The results showed that the high-entropy alloy (ScZrNb)0.65[RhPd]0.35 exhibited pure electron-phonon mediated superconductivity with p = 4.9 0.4. Unexpectedly, we revealed that all studied superhydrides exhibit 1.8 < p < 3.2. This implies that it is unlikely that the electron-phonon interaction is the primary mechanism for the Cooper pairs formation in highly-compressed superhydrides, and alternative pairing mechanisms, for instance, the electron-magnon, the electron-polaron, the electron-electron and other pairing mechanisms should be considered as the origin for the emergence of NRTS in these compounds. © 2021 IOP Publishing Ltd. |
Ключевые слова: | CHARGE CARRIERS INTERACTION HYDROGEN-RICH SUPERCONDUCTORS NEAR-ROOM-TEMPERATURE SUPERCONDUCTORS ELECTRON-PHONON INTERACTIONS ELECTRONS HYDROGEN PALLADIUM COMPOUNDS SUPERCONDUCTING MATERIALS TRANSITION METALS CARRIER INTERACTIONS CHARGE CARRIER INTERACTION ELECTRON PHONON HYDROGEN-RICH SUPERCONDUCTOR NEAR ROOM TEMPERATURE NEAR-ROOM-TEMPERATURE SUPERCONDUCTOR PRIMARY MECHANISM ROOM-TEMPERATURE SUPERCONDUCTORS SUPERHYDRIDES TEMPERATURE-DEPENDENT RESISTANCE ENTROPY |
URI: | http://elar.urfu.ru/handle/10995/111598 |
Условия доступа: | info:eu-repo/semantics/openAccess |
Идентификатор РИНЦ: | 47507558 |
Идентификатор SCOPUS: | 85112618210 |
Идентификатор WOS: | 000696085300001 |
Идентификатор PURE: | 23817054 |
ISSN: | 0953-2048 |
DOI: | 10.1088/1361-6668/ac19f3 |
Сведения о поддержке: | The author is grateful for financial support provided by the Ministry of Science and Higher Education of Russia (theme ‘Pressure’ No. AAAA-A18-118020190104-3) and by Act 211 Government of the Russian Federation, Contract No. 02.A03.21.0006. |
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-s2.0-85112618210.pdf | 21,04 MB | Adobe PDF | Просмотреть/Открыть |
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