Evidence of electronic band redistribution in La0.65Sr0.35MnO3-? by hard x-ray photoelectron spectroscopy (Articolo in rivista)

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  • Evidence of electronic band redistribution in La0.65Sr0.35MnO3-? by hard x-ray photoelectron spectroscopy (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.86.155102 (literal)
Alternative label
  • C. Schlueter; P. Orgiani; T.-L. Lee; A. Yu. Petrov; A. Galdi; B. A. Davidson; J. Zegenhagen; C. Aruta; (2012)
    Evidence of electronic band redistribution in La0.65Sr0.35MnO3-? by hard x-ray photoelectron spectroscopy
    in Physical review. B, Condensed matter and materials physics; American Physical Society (APS), College Pk (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • C. Schlueter; P. Orgiani; T.-L. Lee; A. Yu. Petrov; A. Galdi; B. A. Davidson; J. Zegenhagen; C. Aruta; (literal)
Pagina inizio
  • 155102-1 (literal)
Pagina fine
  • 155102-7 (literal)
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  • http://link.aps.org/doi/10.1103/PhysRevB.86.155102 (literal)
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  • 86 (literal)
Rivista
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  • 7 (literal)
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  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
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  • ESRF, European Synchrotron Radiation Facility, 6 rue J. Horowitz, 38043 Grenoble, France; CNR-SPIN and University of Salerno, I-84084 Fisciano (SA), Italy; Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, OX11 0DE, UK; CNR-IOM TASC, Area Science Park, I-34149 Basovizza (TS), Italy; CNR-SPIN and Dipartimento di Scienze Fisiche, Via Cintia, I-80126 Napoli, Italy; (literal)
Titolo
  • Evidence of electronic band redistribution in La0.65Sr0.35MnO3-? by hard x-ray photoelectron spectroscopy (literal)
Abstract
  • La0.65Sr0.35MnO3-d (LSMO) films (d= 0, 0.07, 0.12) were studied by hard x-ray photoelectron spectroscopy. It is found that the Mn 3d valence band states shift to higher binding energies for oxygen-deficient samples, while their overall width decreases as a result of the reduced density of charge carriers. The concurrent disappearance of the well-screened state at the Mn 2p level indicates a decrease in hybridization of the Mn 3d and the doping-induced states. The lack of clear band gap formation for oxygen-deficient LSMO above the metal/insulator transition is compatible not with polaron formation but, rather, with a Mott variable range hopping mechanism, which is also supported by our transport data. The large electron probing depth of hard x-ray photoelectron spectroscopy is crucial for this study because modifications to the electronic structure may occur in the near-surface region. (literal)
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