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Electro-mechanical Properties of Carbon NanotubesWe present a simple picture to understand the bandgap variation of carbon nanotubes with small tensile and torsional strains, independent of chirality. Using this picture, we are able to predict a simple dependence of d(Bandoap)$/$d(strain) on the value of $(N_x-N_y)*mod 3$, for semiconducting tubes. We also predict a novel change in sign of d(Bandgap)$/$d(strain) as a function of tensile strain arising from a change in the value of $q$ corresponding to the minimum bandgap. These calculations are complemented by calculations of the change in bandgap using energy minimized structures, and some important differences are discussed. The calculations are based on the $i$ electron approximation.
Document ID
20020070291
Acquisition Source
Ames Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Anantram, M. P.
(NASA Ames Research Center Moffett Field, CA United States)
Yang, Liu
(MRJ Technology Solutions, Inc. Moffett Field, CA United States)
Han, Jie
(MRJ Technology Solutions, Inc. Moffett Field, CA United States)
Liu, J. P.
(MRJ Technology Solutions, Inc. Moffett Field, CA United States)
Saubum Subhash
Date Acquired
August 20, 2013
Publication Date
January 1, 1998
Subject Category
Solid-State Physics
Funding Number(s)
CONTRACT_GRANT: NAS2-14303
PROJECT: RTOP 519-40-12
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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