Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics III

Q 62.75: Poster

Thursday, March 26, 2015, 17:00–19:00, C/Foyer

Nano-scale rotor driven by single-electron tunneling — •Alan Celestino, Alexander Eisfeld, and Alexander Croy — MPIPKS, Dresden, Germany

We study theoretically the dynamics and the electronic transport in a nano-scale rotor. The rotor is driven by electron tunneling in the Coulomb-blockade regime. We show that a static bias can lead to self-excitation of intermittent oscillatory/rotatory or continuous rotational motion. We establish the connection between the dynamical regimes and the current through the device. The relevant device's parameters are identified and we study the dynamics' dependence on these parameters. Notably, in the intermittent regime we found a negative differential conductance window. The current-voltage characteristics can be used to infer details of the surrounding environment which is responsible for damping. Finally, we show how to break the system's symmetry in order to recast it as a rectifier.