Ferromagnetism and Metal-Insulator Transitions in Correlated Electron Systems with Alloy Disorder |
| K. Byczuk a,b, U. Yu a, W. Hofstetter c and D. Vollhardt a
a Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany b Institute of Theoretical Physics, University of Warsaw, Hoża 69, 00-681 Warszawa, Poland c Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, 60438 Frankfurt/Main, Germany |
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| Alloy disorder can affect ferromagnetism and metal-insulator transitions of correlated lattice fermion systems in subtle and often unexpected ways. Solving the Hubbard model and the periodic Anderson model within dynamical mean-field theory we show that alloy disorder can increase the Curie temperature of a non-disordered system, and also yields novel Mott or Kondo insulators at fractional electronic densities. |
| DOI: 10.12693/APhysPolA.115.7 PACS numbers: 71.23.-k, 75.20.Hr, 75.30.Mb |