Fermi Surface of The One-dimensional Kondo Lattice Model

S. Moukouri; L. G. Caron

doi:10.1103/PhysRevB.54.12212

paper

Fermi Surface of The One-dimensional Kondo Lattice Model

arXiv:cond-mat/9607123 · doi:10.1103/PhysRevB.54.12212

Abstract

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 $k_{F} = (1 + ρ) π /2$ , $ρ$ 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.

11 pages, 6 figures