Curvature induced optical phonon frequency shift in metallic carbon nanotubes

Details Curvature induced optical phonon frequency shift in metallic carbon nanotubes Curvature induced optical phonon frequency shift in metallic carbon nanotubes

2008-03-27

arxiv.org/abs/0803.3847v1

Phys. Rev. B 77, 245441 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 8 figures

Scientific paper

10.1103/PhysRevB.77.245441

The quantum corrections to the frequencies of the $\Gamma$ point longitudinal optical (LO) and transverse optical (TO) phonon modes in carbon nanotubes are investigated theoretically. The frequency shift and broadening of the TO phonon mode strongly depend on the curvature effect due to a special electron-phonon coupling in carbon nanotubes, which is shown by the Fermi energy dependence of the frequency shift for different nanotube chiralities. It is also shown that the TO mode near the $\Gamma$ point decouples from electrons due to local gauge symmetry and that a phonon mixing between LO and TO modes is absent due to time-reversal symmetry. Some comparison between theory and experiment is presented.

Affiliated with

Also associated with

No associations

Rating

Curvature induced optical phonon frequency shift in metallic carbon nanotubes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Curvature induced optical phonon frequency shift in metallic carbon nanotubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Curvature induced optical phonon frequency shift in metallic carbon nanotubes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-353620