Berlin 2005 – wissenschaftliches Programm
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DY: Dynamik und Statistische Physik
DY 34: Poster
DY 34.115: Poster
Montag, 7. März 2005, 15:30–18:00, Poster TU D
Transport through double barriers in Luttinger liquids — •Tilman Enss1, Sabine Andergassen1, Volker Meden2, Xavier Barnabé-Thériault2, Walter Metzner1, and Kurt Schönhammer2 — 1Max-Planck-Institut für Festkörperforschung, Stuttgart — 2Institut für Theoretische Physik, Universität Göttingen
We study the conductance through an interacting nanowire containing impurities and coupled to non-interacting leads. Our functional RG method starts from the microscopical model and arrives at an effective low-energy model showing Luttinger-liquid behavior. For a double barrier enclosing a dot region, the conductance is determined over several decades of the temperature and for arbitrary impurity strength. Depending on the parameters of the dot we find temperature regimes in which the conductance follows power laws with universal exponents as well as non-universal behavior.