Effective-mass approach to interaction effects on electronic structure in carbon nanotubes

Effects of Coulomb interaction on the band structure are studied for carbon nanotubes in a random-phase approximation within a k · p scheme. The energy gaps are strongly enhanced due to the interaction, while effects on the effective mass along the axis direction are small. For realistic values of t...

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Bibliographic Details
Published in:Physica. E, Low-dimensional systems & nanostructures Low-dimensional systems & nanostructures, 2004-04, Vol.22 (1), p.704-707
Main Authors: Sakai, Hideaki, Suzuura, Hidekatsu, Ando, Tsuneya
Format: Article
Language:English
Subjects:
Band gap
Carbon nanotube
Effective-mass theory
Electron–electron interaction
Graphite
GW approximation
Random phase approximation
Single-particle energy
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Summary:Effects of Coulomb interaction on the band structure are studied for carbon nanotubes in a random-phase approximation within a k · p scheme. The energy gaps are strongly enhanced due to the interaction, while effects on the effective mass along the axis direction are small. For realistic values of the interaction parameter, the conventional screened Hartree–Fock approximation works quite well.
ISSN:1386-9477
1873-1759
DOI:10.1016/j.physe.2003.12.104