Magnetomotive instability and generation of mechanical vibrations in suspended semiconducting carbon nanotubes

A. Nordenfelt, Y. a. Tarakanov, L. Y. Gorelik, R. I. Shekhter, M. Jonson

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We investigate the electromechanics of a freely suspended semiconducting carbon nanotube subjected to a magnetic field H in the currentbiased regime and show that self-excitation of mechanical nanotube vibrations can occur if H exceeds a critical value Hc of the order of 10-100mT. The effect can be detected by measuring the magnetic field dependence of the timeaveraged 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. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

Original languageEnglish
Article number123013
JournalNew Journal of Physics
Volume12
DOIs
Publication statusPublished - Dec 2010

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