Kohn Anomaly in Raman Spectroscopy of Single Wall Carbon Nanotubes
arXiv:1004.5473 · doi:10.1016/j.physe.2010.03.007
Abstract
Phonon softening phenomena of the point optical modes including the longitudinal optical mode, transverse optical mode and radial breathing mode in "metallic" single wall carbon nanotubes are reviewed from a theoretical point of view. The effect of the curvature-induced mini-energy gap on the phonon softening which depends on the Fermi energy and chirality of the nanotube is the main subject of this article. We adopt an effective-mass model with a deformation-induced gauge field which provides us with a unified way to discuss the curvature effect and the electron-phonon interaction.
arXiv comment36 pages, 9 figures
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Cited by in corpus (5)
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- Chiral Gauge Theory for Graphene Edge
- Soliton Trap in Strained Graphene Nanoribbons
- Valley-antisymmetric potential in graphene under dynamical deformation