Torsional instability of chiral carbon nanotubes
Name
Vercosa-2010-Torsional instabilit.pdf
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Author(s)
Dresselhaus, Mildred
Vercosa, D. G.
Barros, Eduardo B.
Souza Filho, A. G.
Mendes Filho, J.
Samsonidze, Ge. G.
Salito, R.
Date Issued
April 2010
Journal
Physical Review B
Publisher
American Physical Society
Citation
Vercosa, D.G. et al. "Torsional instability of chiral carbon nanotubes." Physical Review B 81.16 (2010): 165430.
Version
Final published version
Abstract
In this work we investigate the presence of a torsional instability in single-wall carbon nanotubes which causes small diameter chiral carbon nanotubes to show natural torsion. To obtain insight into the nature of this instability, the natural torsion is calculated using an extended tight-binding model and is found to decrease as the inverse cube of the diameter. The dependence of the natural torsion on chiral angle is found to be different for metallic and semiconducting nanotubes, specially for near-armchair nanotubes, for which the behavior of semiconducting nanotubes deviates from the simple sin(6θ) behavior observed for metallic nanotubes. The presence of this natural torsion implies a revision of the calculation of the chiral angle of the nanotubes.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevB.81.165430
