Protracted Screening in the Periodic Anderson Model

Details Protracted Screening in the Periodic Anderson Model Protracted Screening in the Periodic Anderson Model

1996-10-25

arxiv.org/abs/cond-mat/9610188v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, LaTeX and 4 PS figures

Scientific paper

10.1103/PhysRevB.55.R3332

The asymmetric infinite-dimensional periodic Anderson model is examined with a quantum Monte Carlo simulation. For small conduction band filling, we find a severe reduction in the Kondo scale, compared to the impurity value, as well as protracted spin screening consistent with some recent controversial photoemission experiments. The Kondo screening drives a ferromagnetic transition when the conduction band is quarter-filled and both the RKKY and superexchange favor antiferromagnetism. We also find RKKY-driven ferromagnetic and antiferromagnetic transitions.

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