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TT: Fachverband Tiefe Temperaturen
TT 11: Poster Session: Matter at Low Temperature
TT 11.21: Poster
Monday, March 14, 2011, 14:00–18:00, P4
Strongly correlated fermions in disordered optical lattices — •Denis Semmler1, Krzysztof Byczuk2,3, and Walter Hofstetter1 — 1Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, 60438 Frankfurt am Main, Germany — 2Institute of Theoretical Physics, Warsaw University, ul. Hoża 69, 00-681 Warszawa, Poland — 3Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute for Physics, University of Augsburg, 86135 Augsburg, Germany
Strongly correlated fermions in binary and speckle disordered optical lattices are investigated. We numerically solve the Anderson-Hubbard model within the statistical dynamical mean-field theory, which incorporates fluctuations due to disorder as well as local correlations. Localization due to disorder is studied by means of the probability distribution function of the local density of states. In both cases, the paramagnetic ground state phase diagram is determined. Binary disordered fermions exhibit a Mott metal-insulator transition at non-integer filling. In contrast to box disordered fermions, the Anderson-Mott insulator and the Mott insulator are not continuously connected in the presence of speckle disorder.