Dresden 2006 – scientific programme

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TT: Tiefe Temperaturen

TT 14: Symposium Molecular Electronics

TT 14.4: Fachvortrag

Tuesday, March 28, 2006, 11:15–11:45, HSZ 02

Novel quantum transport effects in single-molecule junctions — •Felix von Oppen — Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin

Single-molecule junctions differ from more conventional nanstructures such as quantum dots due to the coupling between the electrons and few, well-defined vibrational modes. In this talk, I show that this coupling can lead to transport in the form of a self-similar hierarchy of avalanches of many electrons as well as to tunneling of electron pairs. Self-similar avalanche transport occurs in the regime of strong electron-phonon coupling when the current drives the molecular vibrations out of thermal equilibrium. Tunneling of electron pairs dominates transport when the polaronic renormalization leads to a negative effective charging energy of the molecule.

This work was done in collaboration with Jens Koch (Berlin) and M.E. Raikh (Utah)