New results about the one dimensional Kondo lattice model

1997/10/16 by Karyn Le Hur, Hur, K. Le
Physics and Astronomy · #Advanced Chemical Physics Studies #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.cond-mat/9710168

openalex publication_date 1997/10/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The one-dimensional Kondo lattice model (1D KLM) is usually defined by the Kondo exchange J between conduction electrons and spins of the array, and the hopping strength t for the moving electrons. Here, we also include a direct exchange K term between spins of the lattice, and we investigate situations where the bare value of K does not exceed J. By using the non-Abelian bosonization, we show that a coherent heavy-fermion phase can be stabilized, when the bare value of K exceeds the RKKY exchange (ruled by T_A≃ J²/t). Conversely, when K

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