"Exhaustion" Physics in the Periodic Anderson Model using Iterated Perturbation Theory
N. S. Vidhyadhiraja (1, 2), A. N. Tahvildar-Zadeh (1), Mark, Jarrell(1), H. R. Krishnamurthy(2)((1)Deptt. of Physics, University of, Cincinnati, OH, USA, (2) Deptt. of Physics, Indian Institute of Science,, Bangalore, India)
TL;DR
This paper investigates the exhaustion phenomenon in the Periodic Anderson Model using Iterated Perturbation Theory within Dynamical Mean Field Theory, revealing energy-dependent suppression of the effective impurity problem and agreement with Quantum Monte Carlo results.
Contribution
It demonstrates that IPT can qualitatively capture exhaustion physics and its impact on low energy scales in the lattice model.
Findings
IPT captures exhaustion physics despite limitations
Strong energy-dependent suppression of the effective impurity problem
Qualitative agreement with Quantum Monte Carlo results
Abstract
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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