Local density of states at zigzag edge of carbon nanotubes and graphene

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dc.creatorSasaki, K.
dc.creatorSato, K.
dc.creatorJiang, J.
dc.creatorSaito, R.
dc.creatorOnari, S.
dc.creatorTanaka, Y.
dc.date2007-03-12
dc.date2007-03-14
dc.date.accessioned2026-07-07T08:11:11Z
dc.date.available2026-07-07T08:11:11Z
dc.descriptionThe electron-phonon matrix element for edge states of carbon nanotubes and graphene at zigzag edges is calculated for obtaining renormalized energy dispersion of the edge states. Self-energy correction by electron-phonon interaction contributes to the energy dispersion of edge states whose energy bandwidth is similar to phonon energy. Since the energy-uncertainty of the edge state is larger than temperature, we conclude that the single-particle picture of the edge state in not appropriate when the electron-phonon interaction is taken into account. The longitudinal acoustic phonon mode contributes to the matrix element through the on-site deformation potential because the wavefunction of the edge state has an amplitude only on one of the two sublattices. The on-site deformation potentials for the longitudinal and in-plane tangential optical phonon modes are enhanced at the boundary. The results of local density of states are compared with the recent experimental data of scanning tunneling spectroscopy.
dc.description8 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0703318
dc.identifierhttp://arxiv.org/abs/cond-mat/0703318
dc.identifierPhys. Rev. B 75, 235430 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.235430
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/132041
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleLocal density of states at zigzag edge of carbon nanotubes and graphene
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