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hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorCROITORU, Mihail D.
hal.structure.identifierDepartement Fysica
dc.contributor.authorSHANENKO, A. A.
hal.structure.identifierDepartement Fysica
dc.contributor.authorPEETERS, F. M.
hal.structure.identifierInstitut für Theroetische Physik III
dc.contributor.authorAXT, V. M.
dc.date.created2011-05-20
dc.date.issued2011-12-15
dc.identifier.issn1098-0121
dc.description.abstractEnWe investigate how the interplay of quantum confinement and particle number-parity fluctuations affects superconducting correlations in ultra-small metallic grains. Using the number-parity projected BCS formalism we calculate the critical temperature and the excitation gap as a function of the grain size for grains with even and odd number of confined carriers. We show that the experimentally observed anomalous increase of the coupling ratio ΔE/kBTc with decreasing superconducting grain size can be attributed to an enhancement of the number-parity fluctuations in ultra-small grains.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enParity-fluctuation induced enlargement of the ratio Δ_{E}/k_{B}T_{c} in metallic grains
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevB.84.214518
dc.description.sponsorshipEuropeSuperconductivity in quantum-size regime
bordeaux.journalPhysical Review B: Condensed Matter and Materials Physics (1998-2015)
bordeaux.page214518 (1-12)
bordeaux.volume84
bordeaux.issue21
bordeaux.peerReviewedoui
hal.identifierhal-00731880
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00731880v1
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