EFFECT OF CRYSTALLINE ELECTRIC-FIELD ON HEAVY FERMIONS - FERMI-LIQUIDSTATE WITH F(2)-SINGLET CONFIGURATION

Fermi liquid description of heavy Fermions with the f(0) - f(1) - f(2) configuration is studied by using the slave boson technique. In parti cular, it is shown that a new type of Fermi liquid state is realized i n the case where the f(2) configuration with a singlet crystal field g round state is predominant. Namely, the quasiparticle contribution chi (qp) to the magnetic susceptibility is not enhanced while the density of states of quasiparticle is enhanced producing the heavy Fermions. A relevance to an anomalously small reduction of the Knight shift acros s the superconducting transition observed in UPt3 is discussed.