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

Simple item page
dc.creatorKubala, Björn
dc.creatorKönig, Jürgen
dc.creatorPekola, J. P.
dc.date2007-09-26
dc.date2008-04-04
dc.date.accessioned2026-07-07T09:29:59Z
dc.date.available2026-07-07T09:29:59Z
dc.descriptionWe 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.
dc.descriptionpublished version, minor changes; 4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0709.4181
dc.identifierhttp://arxiv.org/abs/0709.4181
dc.identifierPhys. Rev. Lett. 100, 066801 (2008)
dc.identifierdoi:10.1103/PhysRevLett.100.066801
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/157990
dc.subjectMesoscale and Nanoscale Physics
dc.titleViolation of the Wiedemann-Franz Law in a Single-Electron Transistor
dc.typetext

Files

Collections

arXiv