Phase Diagram of the 1D Kondo Lattice Model

I. P. McCulloch; M. Gulacsi; S. Caprara; A. Juozapavicius

paper

Phase Diagram of the 1D Kondo Lattice Model

arXiv:cond-mat/9908414

Abstract

We determine the boundary of the fully polarized ferromagnetic ground state in the one dimensional Kondo lattice model at partial conduction electron band filling by using a newly developed infinite size DMRG method which conserves the total spin quantum number. The obtained paramagnetic to ferromagnetic phase boundary is below $J \approx 3.5$ for the whole range of band filling. By this we solve the controversy in the phase diagram over the extent of the ferromagnetic region close to half filling.

6 pages, 4 EPS figures. Presented at MOS99