Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 101: Transport - Poster Session

TT 101.18: Poster

Donnerstag, 3. April 2014, 15:00–19:00, P2

Dynamics of a nano-electromechanical rotor driven by single-electron tunneling — •Alan Celestino¹, Alexander Croy², Marcus Werner Beims³, and Alexander Eisfeld¹ — ¹MPIPKS, Dresden, Germany — ²Chalmers University of Technology S-412 96, Göteborg, Sweden — ³Federal University of Paraná, Curitiba, Brazil

We discuss a nano-electromechanical rotor driven by single-electron tunneling. A possible realization could be a nanotube with quantum dots attached on its extremities, which can freely rotate about a double-walled nanotube axis. The system is driven using a bias voltage between source and drain contacts. Using a few relevant parameters one can set the rotor’s dynamics to either intermittent oscillations/rotations or continuous rotational motion. The connection between the dynamical regimes and the current through the device is established. The effect of tuning initial conditions is also addressed, showing a bistable behaviour in the system’s phase space. Among the possible applications of such device stand out the signal amplification, current rectification and viscosity measurements.
A. Croy and A. Eisfeld, EPL 98, 68004