Coherence scale of coupled Anderson impurities

Lijun Zhu and Jian-Xin Zhu
Phys. Rev. B 83, 195103 – Published 2 May 2011

Abstract

For two coupled Anderson impurities, two energy scales are present to characterize the evolution from the local moment state of the impurities to either the interimpurity singlet or the Kondo singlet ground state. The high-energy scale is found to deviate from the single-ion Kondo temperature and rather scales as the Ruderman-Kittel-Kasuya-Yosida 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.

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  • Received 20 July 2010

DOI:https://doi.org/10.1103/PhysRevB.83.195103

©2011 American Physical Society

Authors & Affiliations

Lijun Zhu and Jian-Xin Zhu

  • Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

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Issue

Vol. 83, Iss. 19 — 15 May 2011

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