Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-03-09
Nature Nanotech. 6, 339 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
main text with 4 figures, supplementary information
Scientific paper
Carbon nanotubes and graphene allow fabricating outstanding nanomechanical resonators. They hold promise for various scientific and technological applications, including sensing of mass, force, and charge, as well as the study of quantum phenomena at the mesoscopic scale. Here, we have discovered that the dynamics of nanotube and graphene resonators is in fact highly exotic. We propose an unprecedented scenario where mechanical dissipation is entirely determined by nonlinear damping. As a striking consequence, the quality factor Q strongly depends on the amplitude of the motion. This scenario is radically different from that of other resonators, whose dissipation is dominated by a linear damping term. We believe that the difference stems from the reduced dimensionality of carbon nanotubes and graphene. Besides, we exploit the nonlinear nature of the damping to improve the figure of merit of nanotube/graphene resonators.
Bachtold Adrian
Chaste Julien
Eichler Alexander
Moser Jan
Wilson-Rae Ignacio
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