Electron-phonon effects and transport in carbon nanotubes
Abstract
We calculate the electron-phonon scattering and binding in semiconducting carbon nanotubes, within a tight binding model. The mobility is derived using a multi-band Boltzmann treatment. At high fields, the dominant scattering is inter-band scattering by LO phonons corresponding to the corners K of the graphene Brillouin zone. The drift velocity saturates at approximately half the graphene Fermi velocity. The calculated mobility as a function of temperature, electric field, and nanotube chirality are well reproduced by a simple interpolation formula. Polaronic binding give a band-gap renormalization of ~70 meV, an order of magnitude larger than expected. Coherence lengths can be quite long but are strongly energy dependent.
Cite
@article{arxiv.cond-mat/0411021,
title = {Electron-phonon effects and transport in carbon nanotubes},
author = {Vasili Perebeinos and J. Tersoff and Phaedon Avouris},
journal= {arXiv preprint arXiv:cond-mat/0411021},
year = {2009}
}
Comments
5 pages and 4 figures