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arXiv · 1311.2317

Self-sustained oscillations in nanoelectromechanical systems induced by Kondo resonance

Taegeun Song·Mikhail N. Kiselev·Konstantin Kikoin·Robert I. Shekhter·Leonid Y. Gorelik
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Abstract

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 limitations 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.

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Taegeun Song, Mikhail N. Kiselev, Konstantin Kikoin, Robert I. Shekhter, Leonid Y. Gorelik. 2013-11-10. Self-sustained oscillations in nanoelectromechanical systems induced by Kondo resonance. https://doi.org/10.1088/1367-2630%2F16%2F3%2F033043

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