Mott-Hubbard and Anderson metal-insulator transitions in correlated lattice fermions with binary disorder

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Semmler, Denis
Byczuk, Krzysztof
Hofstetter, Walter
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Abstract
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Strongly correlated fermions in a crystal or in an optical lattice in the presence of binary alloy disorder are investigated. We employ the statistical dynamical mean-field theory, which incorporates both, local fluctuations due to disorder and local correlations due to interaction, to solve the Anderson-Hubbard model. Localization due to disorder is studied by means of the probability distribution function of the local density of states. We obtain a complete paramagnetic ground state phase diagram consisting of disordered correlated metal, Anderson-Mott insulator, and band insulator.
Comment: 10 pages, 11 figures, published version
Keywords
Condensed Matter - Disordered Systems and Neural Networks, Condensed Matter - Quantum Gases
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