Violation of the Wiedemann-Franz law in a single-electron transistor
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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4
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Physical Review Letters, Volume 100, issue 6, pp. 1-4
Abstract
We 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.Description
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Kubala, B, König, J & Pekola, J 2008, 'Violation of the Wiedemann-Franz law in a single-electron transistor', Physical Review Letters, vol. 100, no. 6, 066801, pp. 1-4. https://doi.org/10.1103/PhysRevLett.100.066801