Regensburg 2004 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 24: Postersitzung III: Korrelierte Elektronen, ”Orbital Physics”

TT 24.27: Poster

Mittwoch, 10. März 2004, 14:30–19:00, Poster A

Self-energy effects in the two-dimensional Hubbard-Model from Functional Renormalisation — •Daniel Rohe — Max-Planck-Institut FKF, Heisenbergstr. 1, 70569 Stuttgart

We present a numerical study of the two-dimensional Hubbard Model in the normal state at low temperatures by means of a functional renormalisation group scheme. It is found that anomalous features arise in the self-energy slightly above a mean-field transition temperature T*. This offers information on possible mechanisms responsible for unusual properties of the model in the normal (non-symmetry-broken) state.