T=0 phase diagram of the double-exchange model - art. no. 012416

We present the T=0 phase diagram of the double-exchange model (ferromagneti c Kondo lattice model) for all values of the carrier concentration n and Hu nd's couplng J, within dynamical mean field theory. We find that depending on the values of n and J, the ground state is either a ferromagnet, a comme nsurate antiferromagnet or some other incommensurate phase with intermediat e wave vectors. The antiferromagnetic phase is separated by first order pha se boundaries and wide regimes of phase separation. The transition from the ferromagnetic phase to an incommensurate phase is second order.