Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 35: CE: Low-dimensional Systems - Materials 3
TT 35.20: Vortrag
Mittwoch, 16. März 2011, 19:30–19:45, HSZ 301
Quantum transport in correlated nanosystems — •Malcolm Einhellinger1, Alex Cojuhovschi1, Eric Jeckelmann1, Sabine Tornow2, and Gertrud Zwicknagl2 — 1Leibniz Universitaet Hannover — 2TU Braunschweig
We investigate the transient dynamics and steady-state transport properties of correlated nanowires and the charge transfer through molecular bridges contacted to donor and acceptor species. The time-evolving block decimation (TEBD) [1] and time-dependent numerical renormalization group (TD-NRG) [2] methods are used to simulate the nonequilibrium dynamics of quantum many-body fermion models. Correlated nanowires are described as interacting one-dimensional fermion chains such as the spinless fermion model and the Hubbard model. We obtain a good agreement with the predictions of the Luttinger liquid theory. To study the charge transfer through molecules we propose a model describing a complex interacting structure contacted to non-interacting leads, which generalizes the tight-binding model proposed in [3], and discuss the TEBD and TD-NRG performances and predictions for this model.
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