Orbital selectivity in Hund's metals: The iron chalcogenides (Articolo in rivista)

Type
Label
  • Orbital selectivity in Hund's metals: The iron chalcogenides (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.87.045122 (literal)
Alternative label
  • Lanata, Nicola; Strand, Hugo U. R.; Giovannetti, Gianluca; Hellsing, Bo; de' Medici, Luca; Capone, Massimo (2013)
    Orbital selectivity in Hund's metals: The iron chalcogenides
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Lanata, Nicola; Strand, Hugo U. R.; Giovannetti, Gianluca; Hellsing, Bo; de' Medici, Luca; Capone, Massimo (literal)
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  • 87 (literal)
Rivista
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  • 5 (literal)
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  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Rutgers State University; University of Gothenburg; CNR IOM Democritos Natl Simulat Ctr; International School for Advanced Studies; Centre National de la Recherche Scientifique (CNRS) (literal)
Titolo
  • Orbital selectivity in Hund's metals: The iron chalcogenides (literal)
Abstract
  • We show that electron correlations lead to a bad metallic state in chalcogenides FeSe and FeTe despite the intermediate value of the Hubbard repulsion U and Hund's rule coupling J. The evolution of the quasiparticle weight Z as a function of the interaction terms reveals a clear crossover at U similar or equal to 2.5 eV. In the weak coupling limit Z decreases for all correlated d orbitals as a function of U and beyond the crossover coupling they become weakly dependent on U while strongly dependent on J. A marked orbital dependence of the Z's emerges even if in general the orbital-selective Mott transition only occurs for relatively large values of U. This two-stage reduction of the quasiparticle coherence due to the combined effect of Hubbard U and the Hund's J suggests that the iron-based superconductors can be referred to as Hund's correlated metals. DOI: 10.1103/PhysRevB.87.045122 (literal)
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