title: Symmetry dependence of vibration-assisted tunneling.
abstract: 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.
authors.affiliation: Institute of Experimental and Applied Physics, University of Regensburg, 93053 Regensburg, Germany. niko.pavlicek@ur.de
authors.forename: Niko
authors.initials: N
authors.lastname: Pavliček
authors.forename: Ingmar
authors.initials: I
authors.lastname: Swart
authors.forename: Judith
authors.initials: J
authors.lastname: Niedenführ
authors.forename: Gerhard
authors.initials: G
authors.lastname: Meyer
authors.forename: Jascha
authors.initials: J
authors.lastname: Repp