Self-organization of irregular nanoelectromechanical vibrations in multimode shuttle structures.
We investigate theoretically multimode electromechanical "shuttle" instabilities in dc voltage-biased nanoelectromechanical single-electron tunneling devices. We show that initially irregular (quasiperiodic) oscillations that occur as a result of the simultaneous self-excitation of several mechanical modes with incommensurable frequencies self-organize into periodic oscillations with a frequency corresponding to the eigenfrequency of one of the unstable modes. This effect demonstrates that a local probe can selectively excite global vibrations of extended objects.
Department of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.
L M
LM
Jonsson
F
F
Santandrea
L Y
LY
Gorelik
R I
RI
Shekhter
M
M
Jonson