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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2024, Volume 119, Issue 3, Pages 234–252
DOI: https://doi.org/10.31857/S1234567824030121 (Mi jetpl7152) 		 
This article is cited in 1 scientific paper (total in 1 paper)

CONDENSED MATTER

Suppression of superconducting fluctuations in multiband superconductors as a mechanism for increasing the critical temperature (brief review)

A. V. Krasavinab, A. V. Vagovb, A. S. Vasenkobc, V. S. Stolyarovdef, A. A. Shanenkob

a National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409 Russia
b National Research University Higher School of Economics, Moscow, 101000 Russia
c Tamm Department of Theoretical Physics, Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991 Russia
d Centre for Advanced Mesoscience and Nanotechnology, Moscow Institute of Physics and Technology (National Research University), Dolgoprudnyi, Moscow region, 141700 Russia
e Dukhov Automatics Research Institute, Moscow, 127055 Russia
f National University of Science and Technology MISIS, Moscow, 119049 Russia
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DOI: https://doi.org/10.31857/S1234567824030121
Abstract: The combination of strongly coupled Cooper pairs and weak superconducting fluctuations is an important prerequisite for achieving high-temperature superconductivity. The review is devoted to the implementation of this condition in multiband superconductors, in which strongly coupled pairs in the shallow conduction band (the Fermi level is close to the band edge) coexist with ordinary, weakly fluctuating Cooper pairs formed in the deep band. As a result of the Josephson coupling between condensates in different bands, such a system is characterized by a high critical coherence temperature due to the presence of strongly coupled pairs and the suppression of superconducting fluctuations. This suppression does not require any special preconditions, and is almost total even if the Josephson coupling between the bands is weak.
Funding agency Grant number
Russian Science Foundation 21-72-30026
Ministry of Science and Higher Education of the Russian Federation
FSWU-2023-0031
FSMG-2023-0014
HSE Basic Research Program
The work was carried out within the framework of the “Priority 2030” program of the National Research Nuclear University MEPhI, and was also supported by the Ministry of Science and Higher Education of the Russian Federation (state task project no. FSWU-2023-0031). Arkady Shanenko and Alexei Vagov thank the Basic Research Program of the HSE Research University that was used to calculate the critical temperature shift. Vasily Stolyarov thanks for the support of the Russian Science Foundation (project no. 21-72-30026 https://rscf.ru/en/project/21-72-30026) and the Ministry of Science and Higher Education of the Russian Federation (state task project no. FSMG-2023-0014).
Received: 22.11.2023
Revised: 04.12.2023
Accepted: 07.12.2023
English version:
Journal of Experimental and Theoretical Physics Letters, 2024, Volume 119, Issue 3, Pages 233–250
DOI: https://doi.org/10.1134/S0021364023603755
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: A. V. Krasavin, A. V. Vagov, A. S. Vasenko, V. S. Stolyarov, A. A. Shanenko, “Suppression of superconducting fluctuations in multiband superconductors as a mechanism for increasing the critical temperature (brief review)”, Pis'ma v Zh. Èksper. Teoret. Fiz., 119:3 (2024), 234–252; JETP Letters, 119:3 (2024), 233–250
Citation in format AMSBIB
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\by A.~V.~Krasavin, A.~V.~Vagov, A.~S.~Vasenko, V.~S.~Stolyarov, A.~A.~Shanenko
\paper Suppression of superconducting fluctuations in multiband superconductors as a mechanism for increasing the critical temperature (brief review)
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2024
\vol 119
\issue 3
\pages 234--252
\mathnet{http://mi.mathnet.ru/jetpl7152}
\crossref{https://doi.org/10.31857/S1234567824030121}
\edn{https://elibrary.ru/sqssqt}
\transl
\jour JETP Letters
\yr 2024
\vol 119
\issue 3
\pages 233--250
\crossref{https://doi.org/10.1134/S0021364023603755}
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