Schwinger boson approach to the fully screened Kondo model

J. Rech, P. Coleman, G. Zarand, O. Parcollet

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20 Scopus citations

Abstract

We apply the Schwinger boson scheme to the fully screened Kondo model and generalize the method to include antiferromagnetic interactions between ions. Our approach captures the Kondo crossover from local moment behavior to a Fermi liquid with a nontrivial Wilson ratio. When applied to the two-impurity model, the mean-field theory describes the “Varma-Jones†quantum phase transition between a valence bond state and a heavy Fermi liquid.

Original languageEnglish (US)
Article number016601
JournalPhysical review letters
Volume96
Issue number1
DOIs
StatePublished - Jan 13 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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