title: Fluctuation broadening in carbon nanotube resonators.
abstract: We simulated the behavior of suspended carbon nanotube resonators over a broad range of temperatures to explore the physics of semiflexible polymers in underdamped environments. We find that thermal fluctuations induce strong coupling between resonance modes. This effect leads to spectral fluctuations that readily account for the experimentally observed quality factors Q ∼ 100 at 300 K. Using a mean-field approach to describe fluctuations, we analytically calculate Q and frequency shifts in tensioned and buckled carbon nanotubes and find excellent agreement with simulations.
authors.affiliation: Applied and Engineering Physics, Laboratory of Atomic and Solid State Physics, and Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY 14853, USA.
authors.forename: Arthur W
authors.initials: AW
authors.lastname: Barnard
authors.forename: Vera
authors.initials: V
authors.lastname: Sazonova
authors.forename: Arend M
authors.initials: AM
authors.lastname: van der Zande
authors.forename: Paul L
authors.initials: PL
authors.lastname: McEuen