Crossover from dilute-Kondo system to heavy-fermion system

Hiroshi Watanabe, Masao Ogata

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Ground-state properties of a Kondo lattice model with random configuration of f electrons are investigated with a variational Monte Carlo method. We show that the crossover from a dilute-Kondo system to a heavy-fermion system occurs when the density of c and f electrons (nc, nf) become comparable, nf nc. In the heavy-fermion region, the correlation between f electrons is strong and the f electrons themselves greatly contribute to the screening of other f -electron moments. We propose that the character of Kondo screening changes from "individual" to "collective" across the crossover.

Original languageEnglish
Article number113111
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number11
DOIs
Publication statusPublished - 2010 Mar 29
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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