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Nonresonant high fr...
Nonresonant high frequency excitation of mechanical vibrations in a graphene based nanoresonator
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- Eriksson, Martin, 1989 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Voinova, Marina, 1958 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Gorelik, Leonid, 1952 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2015-03-06
- 2015
- Engelska.
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Ingår i: New Journal of Physics. - : IOP Publishing. - 1367-2630. ; 17
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Abstract
Ämnesord
Stäng
- We theoretically analyze the dynamics of a suspended graphene membrane which is in tunnel contact with grounded metallic electrodes and subjected to ac-electrostatic potential induced by a gate electrode. It is shown that for such a system the retardation effects in the electronic subsystem generate an effective pumping for the relatively slow mechanical vibrations if the driving frequency exceeds the inverse charge relaxation time. Under this condition there is a critical value of the driving voltage amplitude above which the pumping overcomes the intrinsic damping of the mechanical resonator, leading to a mechanical instability. This nonresonant instability is saturated by nonlinear damping and the system exhibits self-sustained oscillations of relatively large amplitude.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Annan teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies (hsv//eng)
Nyckelord
- nanomechanics
- graphene
- self-sustained oscillation
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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