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Electron-phonon effects and transport in carbon nanotubes

Vasili Perebeinos·J. Tersoff·Phaedon Avouris
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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.

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Vasili Perebeinos, J. Tersoff, Phaedon Avouris. 2004-11-01. Electron-phonon effects and transport in carbon nanotubes. https://doi.org/10.1103/physrevlett.94.086802

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