Band-gap modification by radial deformation in carbon nanotubes

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Calculations of the electronic structure demonstrate that band gap modification such as opening and closure is easily achieved by radial deformations perpendicular to the tube axis. Deformations open the gap in metallic armchair tubes only if the mirror symmetries are broken, and further distortions greatly enhance the gap due to new bonds formed between facing layers. Similar deformations increase the gap in small-gap zigzag tubes, but gap closure occurs due to enhanced sigma*-pi* hybridization effects. This band gap modification is crucial at metal contacts and has important implication in fabricating a quantum dot or multiple quantum dots. [S0163-1829(99)13039-X].
Publisher
AMERICAN PHYSICAL SOC
Issue Date
1999-10
Language
English
Article Type
Article
Keywords

ELECTRONIC-STRUCTURE; HETEROJUNCTIONS; CONDUCTORS; TUBULES; ROPES

Citation

PHYSICAL REVIEW B, v.60, no.15, pp.10656 - 10659

ISSN
0163-1829
DOI
10.1103/PhysRevB.60.10656
URI
http://hdl.handle.net/10203/75154
Appears in Collection
NT-Journal Papers(저널논문)PH-Journal Papers(저널논문)
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