Stoichiometry-driven switching between surface reconstructions on SrTiO3(001)
Controlling the surface structure on the atomic scale is a major difficulty for most transition metal oxides; this is especially true for the ternary perovskites. The influence of surface stoichiometry on the atomic structure of the SrTiO3(001) surface was examined with scanning tunneling microscopy...
| Veröffentlicht in: | Surface science. - 1997. - 621(2014), 100 vom: 16. März, Seite L1-L4 |
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| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2014
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| Zugriff auf das übergeordnete Werk: | Surface science |
| Schlagworte: | Journal Article Low energy electron diffraction Low energy ion scattering Scanning tunneling microscopy Strontium titanate Surface stoichiometry X-ray photoelectron spectroscopy |
| Zusammenfassung: | Controlling the surface structure on the atomic scale is a major difficulty for most transition metal oxides; this is especially true for the ternary perovskites. The influence of surface stoichiometry on the atomic structure of the SrTiO3(001) surface was examined with scanning tunneling microscopy, low-energy electron diffraction, low-energy He+ ion scattering (LEIS), and X-ray photoelectron spectroscopy (XPS). Vapor deposition of 0.8 monolayer (ML) strontium and 0.3 ML titanium, with subsequent annealing to 850 °C in 4 × 10- 6 mbar O2, reversibly switches the surface between c(4 × 2) and (2 × 2) reconstructions, respectively. The combination of LEIS and XPS shows a different stoichiometry that is confined to the top layer. Geometric models for these reconstructions need to take into account these different surface compositions |
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| Beschreibung: | Date Revised 10.11.2023 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 0039-6028 |