Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1545872 | Physica E: Low-dimensional Systems and Nanostructures | 2015 | 11 Pages |
Abstract
Phonon softening phenomena of the ΓΓ 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.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Ken-ichi Sasaki, Hootan Farhat, Riichiro Saito, Mildred S. Dresselhaus,