Observation of a two-dimensional electron gas at the surface of annealed SrTiO3 single crystals by scanning tunneling spectroscopy (Articolo in rivista)

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  • Observation of a two-dimensional electron gas at the surface of annealed SrTiO3 single crystals by scanning tunneling 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.86.155425 (literal)
Alternative label
  • R. Di Capua1,2, M. Radovic 1,3, G. M. De Luca 1, I. Maggio-Aprile 4, F. Miletto Granozio 1, N. C. Plumb 5, Z. Ristic 1,4, U. Scotti di Uccio 1,6, R. Vaglio 1,6 and M. Salluzzo 1 (2012)
    Observation of a two-dimensional electron gas at the surface of annealed SrTiO3 single crystals by scanning tunneling spectroscopy
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • R. Di Capua1,2, M. Radovic 1,3, G. M. De Luca 1, I. Maggio-Aprile 4, F. Miletto Granozio 1, N. C. Plumb 5, Z. Ristic 1,4, U. Scotti di Uccio 1,6, R. Vaglio 1,6 and M. Salluzzo 1 (literal)
Pagina inizio
  • 155425-1 (literal)
Pagina fine
  • 155425-6 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://link.aps.org/doi/10.1103/PhysRevB.86.155425 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 86 (literal)
Rivista
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  • 6 (literal)
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  • 15 (literal)
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  • 1CNR-SPIN, Complesso Universitario Monte S. Angelo, Via Cintia I-80126 Napoli, Italy 2Dipartimento S.pe.S., Università degli Studi del Molise, Via De Sanctis, I-86100 Campobasso, Italy 3LSNS - EPFL, PH A2 354 (Bâtiment PH) Station 3 CH-1015 Lausanne, Switzerland 4Département de Physique de la Matière Condensée, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland 5Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland 6Dipartimento di Scienze Fisiche, Università \"Federico II\" di Napoli, Via Cintia I-80126 Napoli, Italy (literal)
Titolo
  • Observation of a two-dimensional electron gas at the surface of annealed SrTiO3 single crystals by scanning tunneling spectroscopy (literal)
Abstract
  • Scanning tunneling spectroscopy suggests the formation of a two dimensional electron gas (2DEG) on the TiO2 terminated surface of undoped SrTiO3 single crystals annealed at temperature lower than 400 °C in ultra high vacuum conditions. Low energy electron diffraction indicates that the 2D metallic SrTiO3 surface is not structurally reconstructed, suggesting that non-ordered oxygen vacancies created in the annealing process introduce carriers leading to an electronic reconstruction. The experimental results are interpreted in a frame of competition between oxygen diffusion from the bulk to the surface and oxygen loss from the surface itself. (literal)
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