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arXiv · 1203.2319

Magnetic damping of a carbon nanotube NEMS resonator

D. R. Schmid·P. L. Stiller·Ch. Strunk·A. K. Huettel
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Abstract

A suspended, doubly clamped single wall carbon nanotube is characterized at cryogenic temperatures. We observe specific switching effects in dc-current spectroscopy of the embedded quantum dot. These have been identified previously as nano-electromechanical self-excitation of the system, where positive feedback from single electron tunneling drives mechanical motion. A magnetic field suppresses this effect, by providing an additional damping mechanism. This is modeled by eddy current damping, and confirmed by measuring the resonance quality factor of the rf-driven nano-electromechanical resonator in an increasing magnetic field.

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D. R. Schmid, P. L. Stiller, Ch. Strunk, A. K. Huettel. 2012-06-14. Magnetic damping of a carbon nanotube NEMS resonator. https://doi.org/10.1088/1367-2630%2F14%2F8%2F083024

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