Authors: R. Zitzler, Th. Pruschke, and R. Bulla
Journal:
Eur. Phys. J. B 27, 473 (2002)
We discuss the ground state magnetic phase diagram of the Hubbard model off half filling within the dynamical mean-field theory. The effective single-impurity Anderson model is solved by Wilson's numerical renormalization group calculations, adapted to symmetry broken phases. We find a phase separated, antiferromagnetic state up to a critical doping for small and intermediate values of U. If U>4, a Neel state could not be stabilized for any finite doping. At very large U>25, the phase diagram exhibits an island with a ferromagnetic ground state. Spectral properties in the ordered phases are discussed.