Poor man's scaling: spin-anisotropic Kondo and anisotropic Coqblin--Schrieffer models.
We derive the general scaling equation to the second order for a model, describing any point scatterer, with degenerate energy levels, embedded into a gas of itinerant electrons. We show how the obtained previously scaling equations for spin-anisotropic Kondo model follow from it. We introduce the notion of the anisotropic Coqblin--Schrieffer model. We apply the general equation to derive scaling equation for that model and integrate analytically the important particular case of that equation.
Publisher URL: http://arxiv.org/abs/1801.05233
DOI: arXiv:1801.05233v6
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