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|Title:||Unified Character of Correlation Effects in Unconventional Pu-based Superconductors and δPu|
|Authors:||SHIK ALEXANDER; KOLORENC 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|
|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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