Enhanced thermopower under time-dependent gate voltage
Mesoscale and Nanoscale Physics
2012-05-16 v1
Abstract
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.
Keywords
Cite
@article{arxiv.1012.0658,
title = {Enhanced thermopower under time-dependent gate voltage},
author = {Adeline Crépieux and Fedor Simkovic and Benjamin Cambon and Fabienne Michelini},
journal= {arXiv preprint arXiv:1012.0658},
year = {2012}
}