Parametric excitation of a dc shuttle current via spontaneous symmetry breaking
Mesoscale and Nanoscale Physics
2012-12-06 v1
Abstract
We investigate theoretically the dynamics of a spatially symmetric shuttle-system subjected to an ac gate voltage. We demonstrate that in such a system parametric excitation gives rise to mechanical vibrations when the frequency of the ac signal is close to the eigenfrequency of the mechanical subsystem. These mechanical oscillations result in a dc shuttle current in a certain direction due to spontaneous symmetry breaking. The direction of the current is defined by the phase shift between the ac gate voltage and the parametrically excited mechanical oscillations. Dependance of the shuttle current on the dc gate voltage is also analyzed.
Keywords
Cite
@article{arxiv.1212.1035,
title = {Parametric excitation of a dc shuttle current via spontaneous symmetry breaking},
author = {Milton E. Pena-Aza and Alessandro Scorrano and Leonid Y. Gorelik},
journal= {arXiv preprint arXiv:1212.1035},
year = {2012}
}