Influence of vacancies on metallic nanotube transport properties
Authors:
- 30 April 2007
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 90 (18) , 182119
Abstract
The electronic behavior of metallic carbon nanotubes under the influence of atomistic vacancy defects present in the channel is theoretically investigated using non-equilibrium Green’s function method self-consistently coupled with three-dimensional electrostatics. A nearest neighbor tight binding model based on a single orbital is used for the device Hamiltonian. A single vacancy defect in the channel of a small diameter metallic carbon nanotube can decrease its conductance by a factor of 2. More than one vacancy in the channel can further drastically decrease the conductance. Larger diameter nanotubes suffer less from the presence of vacancy defects.
Keywords
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