TY - JOUR
T1 - Crossover from dilute-Kondo system to heavy-fermion system
AU - Watanabe, Hiroshi
AU - Ogata, Masao
PY - 2010/3/29
Y1 - 2010/3/29
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.81.113111
DO - 10.1103/PhysRevB.81.113111
M3 - Article
AN - SCOPUS:77954970420
VL - 81
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 11
M1 - 113111
ER -