Surface antiferromagnetism and incipient metal-insulator transition in strained manganite films (Articolo in rivista)

Type
Label
  • Surface antiferromagnetism and incipient metal-insulator transition in strained manganite films (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.87.214420 (literal)
Alternative label
  • Cossu, F.; Schwingenschloegl, U.; Colizzi, G.; Filippetti, A.; Fiorentini, Vincenzo (2013)
    Surface antiferromagnetism and incipient metal-insulator transition in strained manganite films
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cossu, F.; Schwingenschloegl, U.; Colizzi, G.; Filippetti, A.; Fiorentini, Vincenzo (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 87 (literal)
Rivista
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  • 4 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 21 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • King Abdullah University of Science & Technology; University of Cagliari; University of Cagliari (literal)
Titolo
  • Surface antiferromagnetism and incipient metal-insulator transition in strained manganite films (literal)
Abstract
  • Using first-principles calculations, we show that the (001) surface of the ferromagnet La0.7Sr0.3MnO3 under an epitaxial compressive strain favors antiferromagnetic (AF) order in the surface layers, coexisting with ferromagnetic (FM) bulk order. Surface antiferromagnetism is accompanied by a very marked surface-related spectral pseudogap, signaling an incomplete metal-insulator transition at the surface. The different relaxation and rumpling of the MnO2 and LaO surface planes in the two competing magnetic phases cause distinct work-function changes, which are of potential diagnostic use. The AF phase is recognized as an extreme surface-assisted case of the combination of in-plane AF super-exchange and vertical FM double-exchange couplings that rules magnetism in manganites under in-plane compression. (literal)
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