Self-sustained oscillations in nanoelectromechanical systems induced by Kondo resonance

Taegeun Song, Mikhail N Kiselev, Konstantin Kikoin, Robert I Shekhter, Leonid Y Gorelik
2014 New Journal of Physics  
We investigate instability and dynamical properties of nanoelectromechanical systems represented by a single-electron device containing movable quantum dot attached to a vibrating cantilever via asymmetric tunnel contact. The Kondo resonance in electron tunneling between source and shuttle facilitates self-sustained oscillations originated from strong coupling of mechanical and electronic/spin degrees of freedom. We analyze stability diagram for two-channel Kondo shuttling regime due to
more » ... ons given by the electromotive force acting on a moving shuttle and find that the saturation amplitude of oscillation is associated with the retardation effect of Kondo-cloud. The results shed light on possible ways of experimental realization of dynamical probe for the Kondo-cloud by using high tunability of mechanical dissipation as well as supersensitive detection of mechanical displacement.
doi:10.1088/1367-2630/16/3/033043 fatcat:7k4jukktwrb5xbqlrijzy5mqum