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Perturbative renormalization of multi-channel Kondo-type models

Yoshio Kuramoto
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Abstract

The poor man's scaling is extended to higher order by the use of the open-shell Rayleigh-Schroedinger perturbation theory. A generalized Kondo-type model with the SU(n) times SU(m) symmetry is proposed and renormalized to the third order. It is shown that the model has both local Fermi-liquid and non-Fermi-liquid fixed points, and that the latter becomes unstable in the special case of n=m=2. Possible relevance of the model to the newly found phase IV in Ce_{x}La_{1-x}B_6 is discussed.

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Yoshio Kuramoto. 1998-05-01. Perturbative renormalization of multi-channel Kondo-type models. https://doi.org/10.1007/s100510050466

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