Regensburg 2007 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 20: Correlated Electrons - Poster Session

TT 20.63: Poster

Mittwoch, 28. März 2007, 14:00–17:45, Poster A

Magnetic properties of correlated electrons coupled to localized spins — •Robert Peters and Thomas Pruschke — Institut für theoretische Physik, Friedrich-Hund-Platz 1, 37077 Göttingen

We calculated the magnetic phase diagram of a correlated band coupled to localized spins at each lattice site. This model can be used for d-electrons in cristalline fields where the lower subbands are partially filled and form a local spin which couples to itinerant and interacting electrons. The method we use is the Dynamical Mean Field theory with the Numerical Renormalization group as impurity solver. We observe antiferromagnetism as well as ferromagnetism. We also discuss the behaviour of the MIT at half-filling.