Franck-Condon blockade in suspended carbon nanotube quantum dots

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dc.creatorLeturcq, Renaud
dc.creatorStampfer, Christoph
dc.creatorInderbitzin, Kevin
dc.creatorDurrer, Lukas
dc.creatorHierold, Christofer
dc.creatorMariani, Eros
dc.creatorSchultz, Maximilian G.
dc.creatorvon Oppen, Felix
dc.creatorEnsslin, Klaus
dc.date2008-12-19
dc.date.accessioned2026-07-07T13:09:45Z
dc.date.available2026-07-07T13:09:45Z
dc.descriptionUnderstanding the influence of vibrational motion of the atoms on electronic transitions in molecules constitutes a cornerstone of quantum physics, as epitomized by the Franck-Condon principle of spectroscopy. Recent advances in building molecular-electronics devices and nanoelectromechanical systems open a new arena for studying the interaction between mechanical and electronic degrees of freedom in transport at the single-molecule level. The tunneling of electrons through molecules or suspended quantum dots has been shown to excite vibrational modes, or vibrons. Beyond this effect, theory predicts that strong electron-vibron coupling dramatically suppresses the current flow at low biases, a collective behaviour known as Franck-Condon blockade. Here we show measurements on quantum dots formed in suspended single-wall carbon nanotubes revealing a remarkably large electron-vibron coupling and, due to the high quality and unprecedented tunability of our samples, admit a quantitative analysis of vibron-mediated electronic transport in the regime of strong electron-vibron coupling. This allows us to unambiguously demonstrate the Franck-Condon blockade in a suspended nanostructure. The large observed electron-vibron coupling could ultimately be a key ingredient for the detection of quantized mechanical motion. It also emphasizes the unique potential for nanoelectromechanical device applications based on suspended graphene sheets and carbon nanotubes.
dc.description7 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0812.3826
dc.identifierhttp://arxiv.org/abs/0812.3826
dc.identifierNature Physics 5, 327-331 (2009)
dc.identifierdoi:10.1038/nphys1234
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228841
dc.subjectMesoscale and Nanoscale Physics
dc.titleFranck-Condon blockade in suspended carbon nanotube quantum dots
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