"Exhaustion" Physics in the Periodic Anderson Model using Iterated Perturbation Theory

Details "Exhaustion" Physics in the Periodic Anderson Model using Iterated Perturbation Theory "Exhaustion" Physics in the Periodic Anderson Model using Iterated Perturbation Theory

1999-05-27

arxiv.org/abs/cond-mat/9905408v2

Physics

Condensed Matter

Strongly Correlated Electrons

13 preprint pages including 1 table and 4 eps figures, replaced by revised version, accepted for publication in Europhysics Le

Scientific paper

10.1209/epl/i2000-00171-0

We discuss the "exhaustion" problem in the context of the Periodic Anderson Model using Iterated Perturbation Theory(IPT) within the Dynamical Mean Field Theory. We find that, despite its limitations, IPT captures the exhaustion physics, which manifests itself as a dramatic, strongly energy dependent suppression of the effective Anderson impurity problem. As a consequence, low energy scales in the lattice case are strongly suppressed compared to the "Kondo scale" in the single-impurity picture. The IPT results are in qualitative agreement with recent Quantum Monte Carlo results for the same problem.

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