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Quantum Theory of Materials seminar, PGI-1/IAS-1

Prof. Eugene Kogan

To have (Kondo effect) and have not: Renormalization and Scaling

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10 Oct 2018 11:30
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PGI Lecture Hall

Bar-Ilan University, Israel

Abstract:

We discuss Kondo effect in the framework of a general model, describing a quantum impurity with degenerate energy levels interacting with a gas of itinerant electrons and derive scaling equation for the interaction parameters to the second order for such a model.

The approach is applied to the spin-anisotropic Kondo model generalized for the case of the power law DOS for itinerant electrons. The scaling equation is specified and solved analytically in terms of elliptic functions.

We also introduce spin-anisotropic Coqblin--Schrieffer model, apply the general method to derive scaling equation for that model and integrate the derived equation analytically.

Contact

Prof. Dr. Samir Lounis
Phone: +49 2461 61-4068
Fax: +49 2461 61-2850
email: s.lounis@fz-juelich.de

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