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Originally published in Science Express on 23 July 2009
Science 28 August 2009:
Vol. 325. no. 5944, pp. 1107 - 1110
DOI: 10.1126/science.1174290
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Reports

Coupling Mechanics to Charge Transport in Carbon Nanotube Mechanical Resonators

Benjamin Lassagne,1,* Yury Tarakanov,2 Jari Kinaret,2 Daniel Garcia-Sanchez,1 Adrian Bachtold1,{dagger}

Nanoelectromechanical resonators have potential applications in sensing, cooling, and mechanical signal processing. An important parameter in these systems is the strength of coupling the resonator motion to charge transport through the device. We investigated the mechanical oscillations of a suspended single-walled carbon nanotube that also acts as a single-electron transistor. The coupling of the mechanical and the charge degrees of freedom is strikingly strong as well as widely tunable (the associated damping rate is ~3 x 106 Hz). In particular, the coupling is strong enough to drive the oscillations in the nonlinear regime.

1 Centre d’Investigació en Nanociència i Nanotecnologia (Consejo Superior de Investigaciones Científicas–Institut Català de Nanotecnologia), campus Universitat Autònoma de Barcelona, E-08193 Barcelona, Spain.
2 Department of Applied Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden.

* Present address: Université de Toulouse, Université Paul Sabatier, Institut National des Sciences Appliquées, UMR 5215 Laboratoire de Physique et Chimie de Nano-Objets CNRS, F-31077 Toulouse, France.

{dagger} To whom correspondence should be addressed. E-mail: adrian.bachtold{at}cin2.es

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Coupling Strongly, Discretely.
J. Hone and V. V. Deshpande (2009)
Science 325, 1084-1085
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