  Determinant Quantum Monte Carlo (DQMC) is used to study the effect of
non-zero hopping t_f in the localized f-band of the periodic Anderson model
(PAM) in two dimensions. The low temperature properties are determined in the
plane of interband hybridization V and t_f at fixed U_f and half-filling,
including the case when the sign of t_f is opposite to that of the conduction
band t_d. For t_f and t_d of the same sign, and when t_f=t_d > (V =4_td)^2, the
non-interacting system is metallic. We show that a remnant of the band
insulator to metal line at U_f = 0 persists in the interacting system,
manifesting itself as a maximal tendency toward antiferromagnetic correlations
at low temperature. In this optimal t_f region, short range (e.g.
near-neighbor) and long-range spin correlations develop at similar temperatures
and have comparable magnitude. Both observations are in stark contrast with the
situation in the widely studied PAM (t_f = 0) and single band Hubbard model,
where short range correlations are stronger and develop at higher temperature.
The effect that finite t_f has on Kondo screening is investigated by
considering the evolution of the local density of states for selected t_f as a
function of V . We use mean field theory as a tool to discriminate those
aspects of the physics that are genuinely many-body in character.
