Asymmetric Franck-Condon factors in suspended carbon nanotube quantum dots

Details Asymmetric Franck-Condon factors in suspended carbon nanotube quantum dots Asymmetric Franck-Condon factors in suspended carbon nanotube quantum dots

2009-11-11

arxiv.org/abs/0911.2122v2

Phys. Rev. B 81, 201303(R) (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 3 figures (2 color, 1 BW)

Scientific paper

10.1103/PhysRevB.81.201303

Electronic states and vibrons in carbon nanotube quantum dots have in general different location and size. As a consequence, the conventional Anderson-Holstein model, coupling vibrons to the dot total charge only, may no longer be appropriated in general. Here we explicitly address the role of the spatial fluctuations of the electronic density, yielding space-dependent Franck-Condon factors. We discuss the consequent marked effects on transport which are compatible with recent measurements. This picture can be relevant for tunneling experiments in generic nano-electromechanical systems.

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