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Frustration-induced non-Fermi-liquid behavior in a three-impurity Kondo model

Bruce C. Paul·Kevin Ingersent
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Abstract

A Kondo model for three spin-one-half impurities placed at the vertices of an equilateral triangle is studied using the numerical renormalization-group method. The impurity spins can form two frustrated doublets which, because of the rotation symmetry, couple equally to the conduction band. Over a broad range of antiferromagnetic RKKY interaction strengths, this degeneracy drives the system to one of two novel, non-Fermi-liquid fixed points. Potential scattering is a relevant perturbation at one of these fixed points, but is marginal throughout the second regime.

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Bruce C. Paul, Kevin Ingersent. 1996-07-26. Frustration-induced non-Fermi-liquid behavior in a three-impurity Kondo model. https://arxiv.org/abs/cond-mat/9607190

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