Steele, Gary A. and Hüttel, Andreas K. and Witkamp, Benoit and Poot, Menno and Meerwaldt, Harold B. and Kouwenhoven, Leo P. and van der Zant, Herre S. J. (2009) Strong coupling between single-electron tunneling and nanomechanical motion. Science 325, pp. 1103-1107.
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Other URL: http://dx.doi.org/10.1126/science.1176076
Nanoscale resonators that oscillate at high frequencies are useful in many measurement applications. We studied a high-quality mechanical resonator made from a suspended carbon nanotube driven into motion by applying a periodic radio frequency potential using a nearby antenna. Single-electron charge fluctuations created periodic modulations of the mechanical resonance frequency. A quality factor exceeding 10^5 allows the detection of a shift in resonance frequency caused by the addition of a single-electron charge on the nanotube. Additional evidence for the strong coupling of mechanical motion and electron tunneling is provided by an energy transfer to the electrons causing mechanical damping and unusual nonlinear behavior. We also discovered that a direct current through the nanotube spontaneously drives the mechanical resonator, exerting a force that is coherent with the high-frequency resonant mechanical motion.
|Date:||23 July 2009|
|Institutions:||Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||No|
|Owner:||Dr. Andreas K. Hüttel|
|Deposited On:||03 Nov 2009 18:26|
|Last Modified:||03 Nov 2009 18:26|