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
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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