Regensburg 2010 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 36: TR: Poster Session

TT 36.14: Poster

Donnerstag, 25. März 2010, 14:00–18:00, Poster A

Transport through a Molecular Bridge: Comparison of Different Truncation Schemes for Non-Equilibrium Green Functions — •Brendan Coughlin, Sabine Tornow, and Gertrud Zwicknagl — Institut fuer Mathematische Physik, TU Braunschweig, 38106 Braunschweig, Germany

We present a detailed model study of electron transport through a molecular bridge using analytical methods. Employing an extended Hubbard model for the molecular bridge which is contacted to leads we calculate non-equilibrium Green functions. A scheme of coupled equation of motion is set up with the help of computer algebra systems. To calculate the conductivity higher order decoupling schemes in different parameter regimes are systematically tested and compared with numerical methods.