Ferromagnetism and metal-insulator transition in the disordered Hubbard model |
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| Authors: | Byczuk Krzysztof Ulmke Martin Vollhardt Dieter |
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| Institution: | Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute for Physics, University of Augsburg, D-86135 Augsburg, Germany. |
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| Abstract: | A detailed study of the paramagnetic to ferromagnetic phase transition in the one-band Hubbard model in the presence of binary-alloy disorder is presented. The influence of the disorder (with concentrations x and 1-x of the two alloy ions) on the Curie temperature T(c) is found to depend strongly on electron density n. While at high densities, n>x, the disorder always reduces T(c); at low densities, n
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