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Curie temperature in the Hubbard model with alloy disorder

  • Solid and Condensed State Physics
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Abstract.

Magnetic and electric properties of the Hubbard model with binary alloy disorder are studied within the dynamical mean-field theory. A paramagnet-ferromagnet phase transition and a Mott-Hubbard metal-insulator transition are observed upon varying the alloy concentration. A disorder induced enhancement of the Curie temperature is demonstrated and explained by the effects of band splitting and subband filling.

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Authors and Affiliations

  1. Institute of Theoretical Physics, Warsaw University, ul. Hoża 69, 00-681, Warszawa, Poland

    K. Byczuk

  2. FGAN - FKIE, Neuenahrer Strasse 20, 53343, Wachtberg, Germany

    M. Ulmke

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  1. K. Byczuk
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  2. M. Ulmke
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Correspondence to K. Byczuk.

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Byczuk, K., Ulmke, M. Curie temperature in the Hubbard model with alloy disorder. Eur. Phys. J. B 45, 449–454 (2005). https://doi.org/10.1140/epjb/e2005-00216-2

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