Entropic Spectral Broadening in Carbon Nanotube Resonators

Autor:	Barnard, Arthur W., Sazonova, Vera, van der Zande, Arend M., McEuen, Paul L.
Rok vydání:	2011
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Physics - Computational Physics
Druh dokumentu:	Working Paper
DOI:	10.1073/pnas.1216407109
Popis:	We simulated the behavior of suspended carbon-nanotube (CNT) resonators over a broad range of temperatures to address the unexplained spectral broadening and frequency shifts seen in experiments. We find that thermal fluctuations induce strong coupling between resonance modes. This effect leads to spectral fluctuations which readily account for the experimentally observed quality factors $Q\sim100$ at $300\ K$. Using a mean field approach to describe entropic fluctuations we analytically calculate $Q$ and frequency shifts in tensioned and buckled CNTs and find excellent agreement with simulations. Comment: 5 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1110.1517 Zobrazit plný text záznamu View this record from Arxiv