Theoretical Study of Carbon Nanotubes Adsorbed on the Silicon (100) Surface, And, Explorations on the Modulation of Conductance for Metallic Carbon Nanotubes
Barraza Lopez, Salvador
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https://hdl.handle.net/2142/80535
Description
Title
Theoretical Study of Carbon Nanotubes Adsorbed on the Silicon (100) Surface, And, Explorations on the Modulation of Conductance for Metallic Carbon Nanotubes
Author(s)
Barraza Lopez, Salvador
Issue Date
2006
Doctoral Committee Chair(s)
Hess, Karl
Department of Study
Physics
Discipline
Physics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Condensed Matter
Language
eng
Abstract
Finally, and in a different direction, we calculate the effects of a longitudinal electrostatic perturbation on a metallic carbon nanotube to demonstrate conductance modulation. The external modulation would be screened in bulk metals but occurs in nanotubes because of their quasi two-dimensional shape allowing electrons to interact with nearby charges. This modulation is determined by the strength of the self-consistent potential and its periodicity over shorter or longer distances. We employ the zero temperature single-particle Green's function transport approach in the empirical tight-binding approximation to quantify the conductance.
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