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Dynamics of a nanoscale rotor driven by single-electron tunneling

Alexander Croy (Institutionen för teknisk fysik, Kondenserade materiens teori) ; A. Eisfeld
EPL (0295-5075). Vol. 98 (2012), 6,
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: quantum ground-state, coulomb-blockade nanostructures, systems, oscillations, conductance, transport, regime



Denna post skapades 2012-08-16.
CPL Pubid: 161891

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)

Ämnesområden

Fysik

Chalmers infrastruktur