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

Fingerprint

heavy fermion systems
Fermions
crossovers
Electrons
electrons
Screening
screening
Crystal lattices
Ground state
Monte Carlo method
Monte Carlo methods
fermions
moments
ground state
configurations

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Crossover from dilute-Kondo system to heavy-fermion system. / Watanabe, Hiroshi; Ogata, Masao.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 81, No. 11, 113111, 29.03.2010.

Research output: Contribution to journalArticle

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