Fermi/Non-Fermi Mixing in SU(<i>N</i>) Kondo Effect

Abstract

We apply conformal field theory analysis to the $k$-channel SU($N$) Kondo\nsystem, and find a peculiar behavior in the cases $N &gt; k &gt; 1$, which we call\nFermi/non-Fermi mixing: The low temperature scaling is described as the Fermi\nliquid, while the zero temperature IR fixed point exhibits the non-Fermi liquid\nsignature. We also show that the Wilson ratio is no longer universal for the\ncases $N &gt; k &gt; 1$. The deviation from the universal value of the Wilson ratio\ncould be used as an experimental signal of the Fermi/non-Fermi mixing.\n