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Paper detail

Enhanced thermopower under time-dependent gate voltage

We derive formal expressions of time-dependent energy and heat currents through a nanoscopic device using the Keldysh nonequilibrium Green function technique. Numerical results are reported for a metal/dot/metal junction where the dot level energy is abruptly changed by a step-shaped voltage pulse. Analytical linear responses are obtained for the time-dependent thermoelectric coefficients. We show that the Seebeck coefficient can be enhanced in the transient regime up to an amount (here rising 40%) controlled by both the dot energy and the height of the voltage step.

preprint2010arXivOpen access
Adeline CrépieuxFedor SimkovicBenjamin CambonFabienne Michelini
cond-mat.mes-hall
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Adeline CrépieuxFedor SimkovicBenjamin CambonFabienne Michelini

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