Hüttel, Andreas K. and Steele, Gary A. and Witkamp, Benoit and Poot, Menno and Kouwenhoven, Leo P. and van der Zant, Herre S. J. (2009) Carbon Nanotubes as Ultrahigh Quality Factor Mechanical Resonators. Nano Letters 9, pp. 2547-2552.
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We have observed the transversal vibration mode of suspended carbon nanotubes at millikelvin temperatures by measuring the single-electron tunneling current. The suspended nanotubes are actuated contact-free by the radio frequency electric field of a nearby antenna; the mechanical resonance is detected in the time-averaged current through the nanotube. Sharp, gate-tunable resonances due to the bending mode of the nanotube are observed, combining resonance frequencies of up to ν0 = 350 MHz with quality factors above Q = 10^5, much higher than previously reported results on suspended carbon nanotube resonators. The measured magnitude and temperature dependence of the Q factor shows a remarkable agreement with the intrinsic damping predicted for a suspended carbon nanotube. By adjusting the radio frequency power on the antenna, we find that the nanotube resonator can easily be driven into the nonlinear regime.
|Date:||3 June 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:||15 Jun 2009 12:59|
|Last Modified:||02 Nov 2009 19:31|