I. THEORY OF STRONGLY CORRELATED ELECTRON SYSTEMS

effects Peculiarity of the Kondo effect in the presence of orbital degeneracy is investigated on the basis of scaling equations up to third order. We first formulate a new scaling method with use of the Rayleigh-Schrödinger effective Hamiltonian and the folded diagram technique [?]. On the basis of this method, we investigate an impurity model for CexLa1−xB6 with account of realistic situation with orbital degeneracy [?,?,?]. For the case where the f 1-f 0 charge fluctuation is dominant over the f 1-f 2 one, the effective exchange interaction becomes anisotropic with respect to the orbital pseudo spins, and the system deviates from the SU(4) Coqblin-Schrieffer model conventionally adopted. Because of the different characteristic energies for dynamics of electric and magnetic multipoles, scaling with the single Kondo temperature does not apply to physical quantities such as the resistivity and the magnetic susceptibility [?]. Effects of magnetic field on the quadrupolar ordering are investigate