1993/04/29 by A. A. Aligia, Aligia, A. A., M. Balina +1
Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/9304050
12 pages,REVTEX,no figures,CNEA-CAB-3027
arxiv created 1993/04/29 · arxiv updated 2009/11/30
The appropriate generalization of the isotropic impurity Anderson model for valence fluctuations between two magnetic multiplets ln and ln+1 is solved in the strong-coupling limit of Wilson's renormalization group for l≤ 3. Except in the extreme case of j-j coupling, the ground state is degenerate, the impurity magnetic moment is very small and is overscreened by the conduction electrons. The strong-coupling fixed point turns out to be unstable. Thus, at low enough temperatures the physics of the systems should be governed by an intermediate coupling fixed point and non Fermi-liquid behavior is expected.