Screening of Magnetic Moments in PuAm Alloy: Local Density Approximation and Dynamical Mean Field Theory Study

J. H. Shim, K. Haule, S. Savrasov, and G. Kotliar
Phys. Rev. Lett. 101, 126403 – Published 17 September 2008

Abstract

The puzzling absence of Pu magnetic moments in a PuAm environment is explored using the self-consistent dynamical mean field theory calculations in combination with the local density approximation. We argue that δ-Pu-Am alloys provide an ideal testbed for investigating the screening of moments from the single impurity limit to the dense limit. Several important effects can be studied: volume expansion, shift of the bare Pu on-site f energy level, and the reduction of the hybridization cloud resulting from the collective character of the Kondo effect in the Anderson lattice. These effects compensate each other and result in a coherence scale, which is independent of alloy composition, and is around 800 K.

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  • Received 25 May 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.126403

©2008 American Physical Society

Authors & Affiliations

J. H. Shim1, K. Haule1, S. Savrasov2, and G. Kotliar1

  • 1Department of Physics, Rutgers University, Piscataway, New Jersey 08854, USA
  • 2Department of Physics, University of California, Davis, California 95616, USA

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Vol. 101, Iss. 12 — 19 September 2008

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