Frustration-induced non-Fermi-liquid behavior in a three-impurity Kondo model
Condensed Matter
2007-05-23 v1
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.
Keywords
Cite
@article{arxiv.cond-mat/9607190,
title = {Frustration-induced non-Fermi-liquid behavior in a three-impurity Kondo model},
author = {Bruce C. Paul and Kevin Ingersent},
journal= {arXiv preprint arXiv:cond-mat/9607190},
year = {2007}
}
Comments
RevTex, 4 pages, 1 epsf-embedded EPS figure