Zeitschriftenartikel:
S. Gerhold, Z. Wang, M. Schmid, U. Diebold:
"Stoichiometry-driven switching between surface reconstructions on SrTiO3(001)";
Surface Science,
621
(2014),
S. 1
- 4.
Kurzfassung englisch:
Controlling the surface structure on the atomic scale is amajor 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, lowenergy
He+ ion scattering (LEIS), and X-ray photoelectron spectroscopy (XPS). Vapor deposition of 0.8monolayer
(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.
Schlagworte:
Scanning tunneling microscopy Low energy electron diffraction Low energy ion scattering X-ray photoelectron spectroscopy Surface stoichiometry Strontium titanate
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.