Parametric excitation of dc current in a single-dot shuttle system via spontaneous symmetry breaking
Artikel i vetenskaplig tidskrift, 2013

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 determined by the phase shift between the ac gate voltage and the parametrically excited mechanical oscillations. The dependence of the shuttle current on the dc gate voltage is also analyzed.


charge shuttle



Milton Eduardo Peña-Aza

Göteborgs universitet

A. Scorrano

Leonid Gorelik

Chalmers, Teknisk fysik, Kondenserade materiens teori

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 88 artikel nr 035412-


Den kondenserade materiens fysik