Coupling between electronic transport and longitudinal phonons in suspended nanotubes

Details Coupling between electronic transport and longitudinal phonons in suspended nanotubes Coupling between electronic transport and longitudinal phonons in suspended nanotubes

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005njph....7..243s&link_type=abstract

New Journal of Physics, Volume 7, Issue 1, pp. 243 (2005).

Physics

14

Scientific paper

Current voltage characteristics of suspended single-wall carbon nanotube (NT) quantum dots show a series of steps equally spaced in voltage. The energy scale of this harmonic, low-energy excitation spectrum is consistent with that of the longitudinal low-k phonon mode in the NT. Agreement is found with a Franck Condon-based model in which the phonon-assisted tunnelling process is modelled as a coupling of electronic levels to underdamped quantum harmonic oscillators. Comparison with this model indicates a rather strong electron phonon coupling factor of order unity. We investigate different electron phonon coupling mechanisms and give estimates of the coupling factor.

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