Curie temperature and quantum phase transitions in the Hubbard model with binary alloy disorder

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. Different quantum phase transitions driven by changes of the alloy concentration are identified.

7 pages, 6 figures

References in corpus (1)

• Spintronics: Fundamentals and applications

Cited by in corpus (7)

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• Ultracold bosons in lattices with binary disorder
• Insulator-metal-insulator transition and selective spectral weight transfer in a disordered strongly correlated system
• Correlated electrons in the presence of disorder
• Dynamical Mean-Field Theory
• Mott and Band Insulator Transitions in the Binary Alloy Hubbard Model
• Gutzwiller projection for exclusion of holes: Application to strongly correlated Ionic Hubbard Model and Binary Alloys