%0 Journal Article
%T Coherence scale of coupled Anderson impurities
%A Lijun Zhu
%A Jian-Xin Zhu
%J Physics
%D 2010
%I arXiv
%R 10.1103/PhysRevB.83.195103
%X For two coupled Anderson impurities, two energy scales are present to characterize the evolution from local moment state of the impurities to either of the inter-impurity singlet or the Kondo singlet ground states. The high energy scale is found to deviate from the single-ion Kondo temperature and rather scales as Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction when it becomes dominant. We find that the scaling behavior and the associated physical properties of this scale are consistent with those of a coherence scale defined in heavy fermion systems.
%U http://arxiv.org/abs/1005.5154v3