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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

Wednesday, 08 February 2006
(at 12:30 in room Phy 8.1.09)
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Tunneling in suspended carbon nanotubes assisted by longitudinal phonons

Rafael Gutierrez

Institut für Theoretische Physik
Universität Regensburg

(From cond-mat/0508270): 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.

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Invited by G. Cuniberti, C. Strunk (JClub)

Within the Journal Club 52 568

last modified: 2021.05.05 Wed
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