Dynamics of a nanoscale rotor driven by single-electron tunneling
Artikel i vetenskaplig tidskrift, 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.

systems

transport

quantum ground-state

oscillations

regime

coulomb-blockade nanostructures

conductance

Författare

Alexander Croy

Chalmers, Teknisk fysik, Kondenserade materiens teori

A. Eisfeld

Harvard University

Max Planck-institutet

Europhysics Letters

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

Vol. 98 6

Ämneskategorier

Fysik

DOI

10.1209/0295-5075/98/68004

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2018-02-28