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Dynamical mean-field theory of a correlated gap formation in plutonium monochalcogenides
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Materials Science.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Materials Science.
2009 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 80, no 16, 161103- p.Article in journal (Refereed) Published
Abstract [en]

The correlated Kondo insulator state of the plutonium monochalcogenides is investigated using the dynamical mean-field theory (DMFT) in fluctuating-exchange approximation and the local-density approximation +U (LDA+U). The DMFT-dynamical fluctuations lead to a correlated insulator state at elevated temperature, in sharp contrast to the static LDA+U approach that fails to reproduce both the insulating behavior and anomalous lattice constant. The DMFT conversely predicts the experimentally observed anomalous increase of the gap with pressure and explains the lattice constant very well.

Place, publisher, year, edition, pages
2009. Vol. 80, no 16, 161103- p.
National Category
Physical Sciences
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URN: urn:nbn:se:uu:diva-127443DOI: 10.1103/PhysRevB.80.161103ISI: 000271352100003OAI: oai:DiVA.org:uu-127443DiVA: diva2:330057
Available from: 2010-07-14 Created: 2010-07-13 Last updated: 2017-12-12Bibliographically approved

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Oppeneer, Peter M.

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