Parity-fluctuation induced enlargement of the ratio Δ_{E}/k_{B}T_{c} in metallic grains
| hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
| dc.contributor.author | CROITORU, Mihail D. | |
| hal.structure.identifier | Departement Fysica | |
| dc.contributor.author | SHANENKO, A. A. | |
| hal.structure.identifier | Departement Fysica | |
| dc.contributor.author | PEETERS, F. M. | |
| hal.structure.identifier | Institut für Theroetische Physik III | |
| dc.contributor.author | AXT, V. M. | |
| dc.date.created | 2011-05-20 | |
| dc.date.issued | 2011-12-15 | |
| dc.identifier.issn | 1098-0121 | |
| dc.description.abstractEn | We 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.iso | en | |
| dc.publisher | American Physical Society | |
| dc.title.en | Parity-fluctuation induced enlargement of the ratio Δ_{E}/k_{B}T_{c} in metallic grains | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1103/PhysRevB.84.214518 | |
| dc.description.sponsorshipEurope | Superconductivity in quantum-size regime | |
| bordeaux.journal | Physical Review B: Condensed Matter and Materials Physics (1998-2015) | |
| bordeaux.page | 214518 (1-12) | |
| bordeaux.volume | 84 | |
| bordeaux.issue | 21 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00731880 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00731880v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20B:%20Condensed%20Matter%20and%20Materials%20Physics%20(1998-2015)&rft.date=2011-12-15&rft.volume=84&rft.issue=21&rft.spage=214518%20(1-12)&rft.epage=214518%20(1-12)&rft.eissn=1098-0121&rft.issn=1098-0121&rft.au=CROITORU,%20Mihail%20D.&SHANENKO,%20A.%20A.&PEETERS,%20F.%20M.&AXT,%20V.%20M.&rft.genre=article |
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