Perturbative renormalization of multi-channel Kondo-type models
Condensed Matter
2009-10-31 v1
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.
Cite
@article{arxiv.cond-mat/9805009,
title = {Perturbative renormalization of multi-channel Kondo-type models},
author = {Yoshio Kuramoto},
journal= {arXiv preprint arXiv:cond-mat/9805009},
year = {2009}
}
Comments
14 pages, 10 Postscript figures