Abstract
We study the ground state properties of a Kondo lattice model with random configuration of f electrons, as a function of f-electron density nf. We show that the strength of on-site screening (averaged exchange energy per f electron) shows a rapid decrease at a certain value of nCOf. For nf > nCOf the correlation between f electrons gradually grows and the system is expected to change from local Fermi liquid to heavy Fermi liquid.
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