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Strong-Coupling Behavior of the Critical Temperature of Pb/Ag, Pb/Cu and Pb/Al Nanocomposites Explained by Proximity Eliashberg Theory

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dc.contributor.authorUmmarino, G. A.
dc.date.accessioned2024-12-27T08:26:51Z
dc.date.available2024-12-27T08:26:51Z
dc.date.issued2023
dc.description.abstractThe experimental critical temperature of the systems of superconducting (Pb) and normal (Ag, Cu and Al) nanoparticles, with a random distribution and sizes less than their respective coherence lengths, is governed by the proximity effect, as shown by the experimental data. At first glance, the behavior of the variation in the critical temperature in function of the ratio of volume fractions of the superconducting and the normal metal components seems to suggest a weak coupling behavior for the superconductor. In reality, upon a more careful analysis, using Eliashberg’s theory for the proximity effect, the system instead shows a strong coupling nature. The most interesting thing is that the theory has no free parameters and perfectly explains the behavior of the experimental data just with the assumption in the case of the nanoparticles Ag and Cu, that the value of the density of states at the Fermi level of silver and copper is equal to the value of lead.
dc.identifier.citationUmmarino, G. A. Strong-Coupling Behavior of the Critical Temperature of Pb/Ag, Pb/Cu and Pb/Al Nanocomposites Explained by Proximity Eliashberg Theory / Ummarino, G.A. // Condensed Matter. - 2023. - 8. - № 2. - 10.3390/condmat8020045
dc.identifier.doi10.3390/condmat8020045
dc.identifier.urihttps://www.doi.org/10.3390/condmat8020045
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85163673435&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:001018195200001
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/29087
dc.relation.ispartofCondensed Matter
dc.subjectHigh-Temperature Superconductivity
dc.subjectProximity Effects
dc.subjectSuperconductivity
dc.titleStrong-Coupling Behavior of the Critical Temperature of Pb/Ag, Pb/Cu and Pb/Al Nanocomposites Explained by Proximity Eliashberg Theory
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue2
oaire.citation.volume8
relation.isOrgUnitOfPublicationc8407a6f-7272-450d-8d99-032352c76b55
relation.isOrgUnitOfPublication.latestForDiscoveryc8407a6f-7272-450d-8d99-032352c76b55
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