Magnetomotive Instability and Generation of Mechanical Vibrations in Suspended Semiconducting Carbon Nanotubes
Journal article, 2010

We investigate the electromechanics of a freely suspended semiconducting carbon nanotube subjected to a magnetic field H in the current-biased regime and show that self-excitation of mechanical nanotube vibrations can occur if H exceeds a critical value Hc of the order of 10–100 mT. The effect can be detected by measuring the magnetic field dependence of the time-averaged voltage drop across the nanotube, which has a singularity at H=Hc. We discuss the applications of the device as an active, tuneable radiofrequency oscillator.

carbon nanotube

magnetomotive instability

self oscillation



Anders Nordenfelt

University of Gothenburg

Yury Tarakanov

Chalmers, Applied Physics, Condensed Matter Theory

Leonid Gorelik

Chalmers, Applied Physics, Condensed Matter Theory

Robert I. Shekhter

University of Gothenburg

Mats Jonson

University of Gothenburg

New Journal of Physics

1367-2630 (ISSN)

Vol. 12 12 123013 (9 pages)- 123013

Subject Categories

Physical Sciences



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