The ground-state properties of the symmetric periodic Anderson model in one dimension and at half filling have been studied using the local mean-field (LMF) method. We have calculated the ground-state energy, the local f and conduction moment, the effective hybridization, the double occupancy, and the projected f and conduction density of states. The LMF results are in good agreement with Monte Carlo results and with second-order perturbation theory in the fluctuations results, under the extreme conditions of the one dimensionality. The f- and c-projected density of states show that there is a smooth change in the partial density of states with increasing U, from those of an uncorrelated, hybridized system to those expected for a strongly correlated system, in which the conduction band and the f states are decoupled.
- Received 4 May 1999
- Published in the issue dated 15 November 1999
© 1999 The American Physical Society