PROPERTIES OF THE T-J MODEL IN THE DYNAMICAL MEAN-FIELD THEORY - ONE-PARTICLE PROPERTIES IN THE ANTIFERROMAGNETIC PHASE

We study the one-particle properties of the t-J model within the frame work of Vollhardt's dynamical mean field theory. By introducing an AB- sublattice structure we explicitly allow for a broken symmetry for the spin degrees of freedom and are thus able to calculate the one-partic le spectral function in the antiferromagnetic phase. We observe surpri singly rich structures in the one-particle density of states for T < T -N at finite doping up to 15%. These structures can be related to the well known results for one single hole in the Neel background. We are thus able to establish the relevance of this at a first sight academic limit to physical properties of the t-J model with a finite density o f holes in the thermodynamical limit.