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From Fermi-liquid-like to non-Fermi-liquid behavior of the generalized Anderson impurity model: The Bethe-ansatz solution

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons126936

Zvyagin,  A. A.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zvyagin, A. A. (2002). From Fermi-liquid-like to non-Fermi-liquid behavior of the generalized Anderson impurity model: The Bethe-ansatz solution. Physical Review B, 65(21): 214404, pp. 214404-214404. doi:10.1103/PhysRevB.65.214404.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0015-3145-C
Abstract
The exact solution for the generalized Anderson impurity model is presented. Here localized electrons interact in the shell via a Hubbard-like repulsion and Hund's rule exchange interaction. An impurity reveals, in general, a mixed-valent behavior. Depending on the relative position of the impurity level and the strengths of Hubbard like and Hund's couplings, an impurity can reveal either a Fermi-liquid-like or non-Fermi- liquid-like behavior. The competition between characteristics of in-shell Coulomb interactions can produce a behavior similar to the channel-anisotropic multichannel Kondo situation, which is responsible for the non-Fermi-liquid physics of the model. Similar conclusions can be made for a two-impurity Kondo model.