Ferromagnetism and Metal-Insulator Transitions in Correlated Electron Systems with Alloy Disorder

• Authors: K. Byczuk , U. Yu , W. Hofstetter , D. Vollhardt
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

71.23.-k; 75.20.Hr; 75.30.Mb

Discipline

• 75.30.Mb: Valence fluctuation, Kondo lattice, and heavy-fermion phenomena(see also 71.27.+a Strongly correlated electron systems, heavy fermions; for heavy-fermion superconductors, see 74.70.Tx)
• 75.20.Hr: Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions(for Kondo effect and scattering mechanisms in electronic conduction, see 72.15.Qm and 72.10.Fk)
• 71.23.-k: Electronic structure of disordered solids

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 1
• Pages: 7-12

Dates

published

2009-01

Contributors

author

K. Byczuk

• Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany
• Institute of Theoretical Physics, University of Warsaw, Hoża 69, 00-681 Warszawa, Poland

author

U. Yu

• Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany

author

W. Hofstetter

• Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, 60438 Frankfurt/Main, Germany

author

D. Vollhardt

• Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany

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Identifiers

DOI

10.12693/APhysPolA.115.7