Symmetry-dependence of vibrational-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 e ective single-level system the energy dissipation associated with electron attachment varies spatially by more than a factor of two. 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 nal wave function determines the dissipation in electron transport.

By: Niko Pavlicek, Ingmar Swart, Judith Niedenführ Gerhard Meyer, Jascha Repp

Published in: RZ3868 in 2013


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