  The three dimensional periodic Anderson model is studied with Quantum Monte
Carlo. We find that the cross-over to the Kondo singlet regime is remarkably
sharp at low temperatures, and that the behavior of magnetic correlations is
consistently reflected in both the thermodynamics and the density of states.
The abruptness of the transition suggests that energy changes associated with
the screening of local moments by conduction electrons might be sufficient to
drive large volume changes in systems where applied pressure tunes the ratio of
interband hybridization to correlation energy.
