New results about the one dimensional Kondo lattice model

Details New results about the one dimensional Kondo lattice model New results about the one dimensional Kondo lattice model

1997-10-16

arxiv.org/abs/cond-mat/9710168v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, TEX and 1 figure

Scientific paper

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 $T_A\simeq J^2/t$). Conversely, when $K

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