Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

TT: Tiefe Temperaturen

TT 12: Mesoskopische Systeme II

TT 12.4: Vortrag

Mittwoch, 26. März 2003, 15:30–15:45, HSZ03

Shot noise in tunneling transport through molecules — •Axel Thielmann¹, Matthias H. Hettler¹, Jürgen König², and Gerd Schön² — ¹Forschungszentrum Karlsruhe, Institut für Nanotechnologie, 76021 Karlsruhe, Germany — ²Institut für Theoretische Festkörperphysik , Universtität Karlsruhe, 76128 Karlsruhe, Germany

We consider electrical transport through a single molecule coupled to metal electrodes via tunneling barriers. Using the Anderson model as the simplest interacting model to approximate a molecule we extend the “orthodox” theory to compute the shot noise to arbitrary order in perturbation theory in the tunnel couplings. Specifically, we show that by a combined measurement of current and shot noise, it is possible to deduce deteailed information on the coupling strength of the molecule to the left and right electrode, even in lowest order perturbation theory.