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A Coulomb gas approach to the anisotropic one-dimensional Kondo lattice model at arbitrary filling

E. Novais·E. Miranda·A. H. Castro Neto·G. G. Cabrera
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Abstract

We establish a mapping of a general spin-fermion system in one dimension into a classical generalized Coulomb gas. This mapping allows a renormalization group treatment of the anisotropic Kondo chain both at and away from half-filling. We find that the phase diagram contains regions of paramagnetism, partial and full ferromagnetic order. We also use the method to analyze the phases of the Ising-Kondo chain.

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E. Novais, E. Miranda, A. H. Castro Neto, G. G. Cabrera. 2002-04-29. A Coulomb gas approach to the anisotropic one-dimensional Kondo lattice model at arbitrary filling. https://doi.org/10.1103/physrevb.66.174409

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