文章基本信息

标题：Fluctuation broadening in carbon nanotube resonators
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作者：Arthur W. Barnard ; Vera Sazonova ; Arend M. van der Zande 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2012
卷号：109
期号：47
页码：19093-19096
DOI：10.1073/pnas.1216407109
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：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.
关键词：nanomechanics ; stochastic dynamics ; nonlinear vibrations ; mesoscopic physics