Kohn Anomaly in Raman Spectroscopy of Single Wall Carbon Nanotubes

Abstract

Phonon softening phenomena of the $\Gamma$ 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.

36 pages, 9 figures

References in corpus (7)

• Electric Field Effect Tuning of Electron-Phonon Coupling in Graphene
• Non-adiabatic Kohn-anomaly in a doped graphene monolayer
• Electron scattering on microscopic corrugations in graphene
• Gauge field for edge state in graphene
• Curvature induced optical phonon frequency shift in metallic carbon nanotubes
• Kohn Anomalies in Graphene Nanoribbons
• Chirality dependent frequency shift of radial breathing mode in metallic carbon nanotubes

Cited by in corpus (4)

• Phonon self-energy corrections to non-zero wavevector phonon modes in single-layer graphene
• Decay and Frequency Shift of Inter and Intravalley Phonons in Graphene -Dirac Cone Migration-
• Chiral Gauge Theory for Graphene Edge
• Valley-antisymmetric potential in graphene under dynamical deformation