Dynamics of a nanoscale rotor driven by single-electron tunneling
Journal article, 2012

We investigate theoretically the dynamics and the charge transport properties of a rod-shaped nanoscale rotor, which is driven by a similar mechanism as the nanomechanical single-electron transistor (NEMSET). We show that a static electric potential gradient can lead to self-excitation of oscillatory or continuous rotational motion. We identify the relevant parameters of the device and study the dependence of the dynamics on these parameters. We discuss how the dynamics are related to the measured current through the device. Notably, in the oscillatory regime we find a negative differential conductance. The current-voltage characteristics can be used to infer details of the surrounding environment which is responsible for damping.



quantum ground-state



coulomb-blockade nanostructures



Alexander Croy

Chalmers, Applied Physics, Condensed Matter Theory

A. Eisfeld

Harvard University

Max Planck Society

Europhysics Letters

0295-5075 (ISSN) 1286-4854 (eISSN)

Vol. 98 6 68004

Subject Categories

Physical Sciences



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