Optimization of electron pumping by harmonic mixing
Mesoscale and Nanoscale Physics
2015-03-17 v2 Quantum Physics
Abstract
For a symmetric bridge coupled to infinite leads, in the presence of a dipole-coupled external ac-field with harmonic mixing, we solve the Schr\"odinger equation in the time-domain using open boundary conditions as well as in the energy-domain using Floquet scattering theory. As this potential breaks parity and generalized parity, we find a non-vanishing average current. We then optimize the relative amplitude ratio between the fundamental and the second harmonic leading to a maximum in the pump current.
Keywords
Cite
@article{arxiv.1012.4663,
title = {Optimization of electron pumping by harmonic mixing},
author = {Niklas Rohling and Frank Grossmann},
journal= {arXiv preprint arXiv:1012.4663},
year = {2015}
}
Comments
13 pages, 6 figures, accepted at Phys. Rev. B, http://prb.aps.org/accepted/B/7b073O7dMc412f17647d3877ee3ac5c3e271dcb1c