Schwinger boson approach to the fully screened kondo model
作者： J. Rech , P. Coleman , G. Zarand , O. Parcollet
DOI: 10.1103/PHYSREVLETT.96.016601
关键词: Physics 、 Boson 、 Valence bond theory 、 Quantum phase transition 、 Kondo model 、 Kondo effect 、 Strongly correlated material 、 Fermi liquid theory 、 Wilson ratio 、 Quantum mechanics
摘要: We apply the Schwinger boson scheme to fully screened Kondo model and generalize method include antiferromagnetic interactions between ions. Our approach captures crossover from local moment behavior a Fermi liquid with nontrivial Wilson ratio. When applied two-impurity model, mean-field theory describes "Varma-Jones" quantum phase transition valence bond state heavy liquid.
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