SINGLE AND MULTI – PHASE DYNAMICS OF THE (ANTI)FERROMAGNETIC CeCu2Si2 SYSTEMS.

Abstract

We considered the single site impurity Anderson model with the aid of the application of Exact – diagonalization technique on an open boundary system of two interacting electrons on four sites with twenty eight basis electronic states. The results obtained shows that Increasing Ce content experimentally in CeCu2Si2 is equivalent to increasing the hopping matrix element in this study; and also increasing the values of the on-site hybridization element, V, the system which was originally AFM becomes FM. We also observed that the cost of performing these theoretical simulations is approximately the same as simulating 2 electrons on 4 sites (1-D) in the Anderson model and 4 electrons on 8 sites (1-D) in the one band Hubbard model.