Violation of the Wiedemann-Franz Law in a Single-Electron Transistor

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorKubala, Björn
dc.contributor.authorKönig, Jürgen
dc.contributor.authorPekola, Jukka P.
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.departmentTeknillisen fysiikan laitosfi
dc.contributor.schoolPerustieteiden korkeakoulufi
dc.contributor.schoolSchool of Scienceen
dc.date.accessioned2015-05-22T09:00:44Z
dc.date.available2015-05-22T09:00:44Z
dc.date.issued2008
dc.description.abstractWe study the influence of Coulomb interaction on the thermoelectric transport coefficients for a metallic single-electron transistor. By performing a perturbation expansion up to second order in the tunnel-barrier conductance, we include sequential and cotunneling processes as well as quantum fluctuations that renormalize the charging energy and the tunnel conductance. We find that Coulomb interaction leads to a strong violation of the Wiedemann-Franz law: the Lorenz ratio becomes gate-voltage dependent for sequential tunneling, and is increased by a factor 9/5 in the cotunneling regime. Finally, we suggest a measurement scheme for an experimental realization.en
dc.description.versionPeer revieweden
dc.format.extent066801/1-4
dc.format.mimetypeapplication/pdfen
dc.identifier.citationKubala, Björn & König, Jürgen & Pekola, Jukka. 2008. Violation of the Wiedemann-Franz Law in a Single-Electron Transistor. Physical Review Letters. Volume 100, Issue 6. P. 066801/1-4. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.100.066801.en
dc.identifier.doi10.1103/physrevlett.100.066801
dc.identifier.issn0031-9007 (printed)
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/16177
dc.identifier.urnURN:NBN:fi:aalto-201505212797
dc.language.isoenen
dc.publisherAmerican Physical Society (APS)en
dc.relation.ispartofseriesPhysical Review Lettersen
dc.relation.ispartofseriesVolume 100, Issue 6
dc.rights© 2008 American Physical Society (APS). http://www.aps.org/en
dc.rights.holderAmerican Physical Society (APS)
dc.subject.keywordCoulomb interactionen
dc.subject.keywordthermoelectric transport coefficientsen
dc.subject.keywordmetallic single-electron transistorsen
dc.subject.keywordtunnelingen
dc.subject.otherPhysicsen
dc.titleViolation of the Wiedemann-Franz Law in a Single-Electron Transistoren
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.dcmitypetexten
dc.type.versionFinal published versionen
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