Electron phonon interaction in small-radius carbon nanotubes
Abstract
We perform analysis of the band structure, phonon dispersion, and electron-phonon interactions in several types of small-radius carbon nanotubes. For ultra-small (5,0) and (6,0) tubes we find that the large curvature makes these tubes metallic with a large density of states at the Fermi energy and leads to unusual electron-phonon interactions, with the dominant coupling coming from the out-of-plane phonon modes. By combining the frozen-phonon approximation with the RPA analysis of the giant Kohn anomaly in 1d we find parameters of the effective Frolich Hamiltonian for the conduction electrons and discuss possible instabilities of the electron-phonon system.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2004
- Bibcode:
- 2004APS..MARY15007B