ABCD of Kondo Effect

We explore the Kondo effect incorporating the localized impurity transforming under generic symmetry group G, that we call the G-Kondo effect. We derive the one-dimensional effective model coupled with the impurity, and studied the thermodynamic properties based on the boundary conformal field theor...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2021-02, Vol.90 (2), p.24708
Main Author: Kimura, Taro
Format: Article
Language:English
Subjects:
Electrons
Field theory
General Physics
High Energy Physics - Theory
Impurities
Kondo effect
Low temperature
Physics
Symmetry
Thermodynamic properties
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Summary:We explore the Kondo effect incorporating the localized impurity transforming under generic symmetry group G, that we call the G-Kondo effect. We derive the one-dimensional effective model coupled with the impurity, and studied the thermodynamic properties based on the boundary conformal field theory approach. We in particular study the impurity entropy at the conformal fixed point, and the low temperature behavior of the specific heat and the susceptibility. We also consider the Wilson ratio based on these results, and mention the case with exceptional group symmetry.
ISSN:0031-9015
1347-4073
DOI:10.7566/JPSJ.90.024708