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TT: Tiefe Temperaturen
TT 9: Transport: Nanoelectronics III - Molecular Electronics
TT 9.1: Talk
Monday, March 27, 2006, 14:00–14:15, HSZ 304
Franck-Condon blockade beyond sequential tunneling — •Jens Koch1, Felix von Oppen1, and A. V. Andreev2 — 1Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 2Department of Physics, University of Washington, Box 351560, Seattle, WA 98195, U.S.A.
Recent studies of electronic transport through single-molecule devices have revealed that the coupling of electronic degrees of freedom to a well-defined mode of molecular vibrations may result in a significant current suppression (Franck-Condon blockade). This effect also has characteristic consequences for Fano factors and noise spectra. However, similar to the case of Coulomb blockade, higher-order processes beyond sequential tunneling may become relevant in the blockade regime. Here, we discuss the effects of such corrections on the current-voltage characteristics and noise properties of the system.