Phase diagram of the one-dimensional periodic Anderson model

We have calculated the phase diagram of the symmetric one-dimensional Ander son lattice using the local mean-field method, which can reveal the basic p roperties of the system throughout the entire parameter space. Near quarter and half filling the antiferromagnetic phase is the ground state. For inte rmediate band filling there is a continuous second-order phase transition t o a ferromagnetic state. At quarter filling there is a transition from a me tallic paramagnetic state to an insulating antiferromagnetic state as the o n-site Coulomb interaction increases. (C) 2001 American Institute of Physic s.