Collective Kondo effect in the Anderson-Hubbard lattice

P. Fazekas, K. Itai

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1 Citation (Scopus)

Abstract

The periodic Anderson model is extended by switching on a Hubbard U for the conduction electrons. We use the Gutzwiller variational method to study the nearly integral valent limit. The lattice Kondo energy contains the U-dependent chemical potential of the Hubbard subsystem in the exponent, and the correlation-induced band narrowing in the prefactor. Both effects tend to suppress the Kondo scale, which can be understood to result from the blocking of hybridization. At half-filling, we find a Brinkman-Rice-type transition from a Kondo insulator to a Mott insulator.

Original languageEnglish
Pages (from-to)428-430
Number of pages3
JournalPhysica B: Condensed Matter
Volume230-232
DOIs
Publication statusPublished - Feb 1997

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Keywords

  • Anderson-Hubbard model
  • Gutzwiller method
  • Kondo effect

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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