Schwinger Boson approach to the fully screened Kondo model

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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 non-trivial 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.
4 pages, 4 figures. Changes to references and text in v2

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Strongly Correlated Electrons, Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/96689

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0507001
 http://arxiv.org/abs/cond-mat/0507001
 Phys. Rev. Lett. 96, 016601 (2006).
 doi:10.1103/PhysRevLett.96.016601

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arXiv