Fermi Surface of The One-dimensional Kondo Lattice Model

Details Fermi Surface of The One-dimensional Kondo Lattice Model Fermi Surface of The One-dimensional Kondo Lattice Model

1996-07-17

arxiv.org/abs/cond-mat/9607123v1

Physics

Condensed Matter

11 pages, 6 figures

Scientific paper

10.1103/PhysRevB.54.12212

We show a strong indication of the existence of a large Fermi surface in the one-dimensional Kondo lattice model. The characteristic wave vector of the model is found to be $k_F=(1+\rho )\pi /2$, $\rho $ being the density of the conduction electrons. This result is at first obtained for a variant of the model that includes an antiferromagnetic Heisenberg interaction $J_H$ between the local moments. It is then directly observed in the conventional Kondo lattice $(J_H=0)$, in the narrow range of Kondo couplings where the long distance properties of the model are numerically accessible.

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