Regensburg 2007 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 20: Correlated Electrons - Poster Session

TT 20.58: Poster

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

Antiferromagnetism and Anderson localization of correlated lattice fermions with disorder — •Krzysztof Byczuk¹, Walter Hofstetter², and Dieter Vollhardt¹ — ¹Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute for Physics, University of Augsburg, D-86135 Augsburg, Germany — ²Institut fur Theoretische Physik, Johann Wolfgang Goethe-Universitaet, 60438 Frankfurt/Main, Germany

The phase diagram of correlated, disordered lattice fermions is determined within dynamical mean--field theory supplemented by the geometrically averaged (''typical'') local density of states. Antiferromagnetic insulator, Mott insulator and Anderson insulator phases are found to be separated by continuous phase transitions. Predictions for cold fermionic atoms on optical lattices and solid state systems are presented.