Poor man's scaling: anisotropic Kondo and Coqblin-Schrieffer models

Kogan, Eugene

doi:10.1088/2399-6528/aad484

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Poor man's scaling: anisotropic Kondo and Coqblin-Schrieffer models

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Kogan, Eugene
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Citation

Kogan, E. (2018). Poor man's scaling: anisotropic Kondo and Coqblin-Schrieffer models. Journal of physics communications, 2(8): 085001. doi:10.1088/2399-6528/aad484.

Cite as: https://hdl.handle.net/21.11116/0000-0002-66A4-2

Abstract

We discuss Kondo effect for a general model, describing a quantum impurity with degenerate energy levels, interacting with a gas of itinerant electrons, and derive scaling equation to the second order for such a model. We show how the scaling equation for the spin-anisotropic Kondo model with the power law density of states (DOS) for itinerant electrons follows from the general scaling equation. We introduce the anisotropic Coqblin-Schrieffer model, apply the general method to derive scaling equation for that model for the power law DOS, and integrate the derived equation analytically.