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Unified character o...
Unified character of correlation effects in unconventional Pu-based superconductors and delta-Pu
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Shick, A. B. (author)
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Kolorenc, J. (author)
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- Rusz, Jan (author)
- Uppsala universitet,Materialteori
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- Oppeneer, P. M. (author)
- Uppsala universitet,Materialteori
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Lichtenstein, A. I. (author)
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Katsnelson, M. I. (author)
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Caciuffo, R. (author)
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(creator_code:org_t)
- 2013
- 2013
- English.
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In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 87:2, s. 020505-
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Electronic structure calculations combining the local-density approximation with an exact diagonalization of the Anderson impurity model show an intermediate 5 f(5)-5 f(6)-valence ground state and delocalization of the 5 f(5) multiplet of the Pu atom 5f shell in PuCoIn5, PuCoGa5, and delta-Pu. The 5f local magnetic moment is compensated by a moment formed in the surrounding cloud of conduction electrons. For PuCoGa5 and delta-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 5 f-state antiferromagnetic fluctuations in PuCoIn5 and by valence fluctuations in PuCoGa5.
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- ref (subject category)
- art (subject category)
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