Symmetry dependence of vibration-assisted tunneling

We present spatially resolved vibronic spectroscopy of individual pentacene molecules in a double-barrier tunneling junction. It is observed that even for this effective single-level system the energy dissipation associated with electron attachment varies spatially by more than a factor of 2. This i...

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Bibliographic Details
Published in:Physical review letters 2013-03, Vol.110 (13), p.136101-136101
Main Authors: Pavliček, Niko, Swart, Ingmar, Niedenführ, Judith, Meyer, Gerhard, Repp, Jascha
Format: Article
Language:English
Online Access:Get full text
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Summary:We present spatially resolved vibronic spectroscopy of individual pentacene molecules in a double-barrier tunneling junction. It is observed that even for this effective single-level system the energy dissipation associated with electron attachment varies spatially by more than a factor of 2. This is in contrast to the usual treatment of electron-vibron coupling in the Franck-Condon picture. Our experiments unambiguously prove that the local symmetry of initial and final wave function determines the dissipation in electron transport.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.110.136101