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Journal of Non-Crystalline Solids

Interplay between disorder and electron interactions: mean-field phase diagram of an Anderson-Hubbard model

David E. Logan, Michael A. Tusch

Published May 1, 1993• 3 citations
Publisher
DOI
10.1016/0022-3093(93)90037-x

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Abstract We study the half-filled Hubbard model with Anderson and Coulomb disorder by mean of dynamical mean field theory using the geometrically averaged local density of states. The paramagnetic phase diagram of the model as a function of the Coulomb interaction and Anderson disorder strength is obtained. The spectral phase diagrams of the ground states for the model are also constructed and discussed. We show that in the intermediate and strong interaction regimes, the Coulomb disorder leads the metallic and Mott insulator phase regions shrink, while the Anderson insulator region is enlarged.
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