Periodic Anderson model in infinite dimensions

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Abstract
The symmetric periodic Anderson model is studied in the limit of infinite spatial dimensions within an essentially exact quantum Monte Carlo method. The single-particle spectral function develops a gap Δ, and the neutron structure factor also develops a gap ≊2Δ. Depending upon the ratio of Δ to other energy scales, there is a transition to an antiferromagnetic state. In the paramagnetic state, both the f-orbital specific heat and ferromagnetic susceptibility display rough scaling with T/Δ; for T>Δ they are heavy-fermion-like while for T<Δ they are insulatorlike.

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