Abstract
Phonon softening phenomena of the Γ 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 electronphonon interaction.
| Original language | English |
|---|---|
| Pages (from-to) | 2005-2015 |
| Number of pages | 11 |
| Journal | Physica E: Low-Dimensional Systems and Nanostructures |
| Volume | 42 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2010 Jun 1 |
Keywords
- Carbon nanotube
- Curvature effect
- Energy gap
- Fermi energy
- Graphene
- Phonon self-energy
- Raman G band
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
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Cite this
Sasaki, K. I., Farhat, H., Saito, R., & Dresselhaus, M. S. (2010). Kohn anomaly in Raman spectroscopy of single wall carbon nanotubes. Physica E: Low-Dimensional Systems and Nanostructures, 42(8), 2005-2015. https://doi.org/10.1016/j.physe.2010.03.007