Effect of electric field on the electronic structures of carbon nanotubes

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We have investigated the electronic structures of a capped single-walled carbon nanotube under the applied electric field using density functional calculations. The capped tube withstands field strengths up to 2 V/Angstrom. When the electric field is applied along the tube axis, charges are transferred from the occupied levels localized at the top pentagon of the cap, and not from the highest occupied level localized at the side pentagon, to the unoccupied levels. We find that the charge densities at the top of the armchair cap show two- or five-lobed patterns depending on the field strength, whereas those of the zigzag cap show a three-lobed pattern. The interpretation for the images of the field emission microscope is also discussed. (C) 2001 American Institute of Physics.
Publisher
AMER INST PHYSICS
Issue Date
2001-08
Language
English
Article Type
Article
Keywords

EMISSION

Citation

APPLIED PHYSICS LETTERS, v.79, no.8, pp.1187 - 1189

ISSN
0003-6951
DOI
10.1063/1.1389515
URI
http://hdl.handle.net/10203/83479
Appears in Collection
CH-Journal Papers(저널논문)
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