0 N ov 2 00 1 The Kondo lattice model from strong-coupling viewpoint


We study the magnetic excitation spectrum of the two-dimensional (2D) squarelattice S=1/2 Kondo lattice model at finite (hole) doping, by representing the Hamiltonian in terms of a set of local excitations. The location of the paramagneticantiferromagnetic phase boundary at T=0 is determined. 

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