Tunneling in suspended carbon nanotubes assisted by longitudinal phonons
Current-voltage characteristics of suspended single-wall carbon nanotube 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 (stretching mode) in the nanotube. A...
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| Veröffentlicht in: | arXiv.org 2005-08 |
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| creator | Sapmaz, S Jarillo-Herrero, P Blanter, Ya M Dekker, C H S J van der Zant |
| description | Current-voltage characteristics of suspended single-wall carbon nanotube 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 (stretching mode) in the nanotube. Agreement is found with a Franck-Condon-based model in which the phonon-assisted tunneling process is modeled 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. |
| doi_str_mv | 10.48550/arxiv.0508270 |
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| subjects | Coupling Current voltage characteristics Excitation spectra Harmonic oscillators Nanotubes Phonons Quantum dots Single wall carbon nanotubes |
| title | Tunneling in suspended carbon nanotubes assisted by longitudinal phonons |
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