Title: Unified Character of Correlation Effects in Unconventional Pu-based Superconductors and δPu
Authors: SHIK ALEXANDERKOLORENC J.RUSZ J.OPPENEER P. M.LICHTENSTEIN A.i.KATSNELSON M.i.CACIUFFO Roberto
Citation: PHYSICAL REVIEW B vol. 87 no. 2 p. 020505-1 - 020505-5
Publisher: AMER PHYSICAL SOC
Publication Year: 2013
JRC N°: JRC75694
ISSN: 1098-0121
URI: http://prb.aps.org/abstract/PRB/v87/i2/e020505
http://publications.jrc.ec.europa.eu/repository/handle/JRC75694
DOI: 10.1103/PhysRevB.87.020505
Type: Articles in periodicals and books
Abstract: Electronic structure calculations combining the local-density approximation with an exact diagonalization of the Anderson impurity model show an intermediate 5f 5-5f 6-valence ground state and delocalization of the 5f 5 multiplet of the Pu atom 5f shell in PuCoIn5, PuCoGa5, and δ-Pu. The 5f local magnetic moment is compensated by a moment formed in the surrounding cloud of conduction electrons. For PuCoGa5 and δ-Pu the compensation is complete, and the Anderson impurity ground state is a singlet. For PuCoIn5 the compensation is partial, and the Pu ground state is magnetic. We suggest that the unconventional d-wave superconductivity is likely mediated by the 5f -state antiferromagnetic fluctuations in PuCoIn5 and by valence fluctuations in PuCoGa5.
JRC Directorate:Nuclear Safety and Security

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