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29 March 2024
 
  » arxiv » cond-mat/0202362

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Electronic transport through carbon nanotubes -- effects of structural deformation and tube chirality
Amitesh Maiti ; Alexei Svizhenko ; M. P. Anantram ;
Date 21 Feb 2002
Subject Materials Science; Mesoscopic Systems and Quantum Hall Effect | cond-mat.mtrl-sci cond-mat.mes-hall
AbstractAtomistic simulations using a combination of classical forcefield and Density-Functional-Theory (DFT) show that carbon atoms remain essentially sp2 coordinated in either bent tubes or tubes pushed by an atomically sharp AFM tip. Subsequent Green’s-function-based transport calculations reveal that for armchair tubes there is no significant drop in conductance, while for zigzag tubes the conductance can drop by several orders of magnitude in AFM-pushed tubes. The effect can be attributed to simple stretching of the tube under tip deformation, which opens up an energy gap at the Fermi surface.
Source arXiv, cond-mat/0202362
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