In situ investigation of the early stage of TiO{sub 2} epitaxy on (001) SrTiO{sub 3}
- LSNS - EPFL, PH A2 354 (Batiment PH) Station 3 CH-1015 Lausanne (Switzerland)
- CNR-SPIN, Complesso Universitario Monte S. Angelo, Via Cintia I-80126 Napoli (Italy)
We report on a systematic study of the growth of epitaxial TiO{sub 2} films deposited by pulsed laser deposition on Ti-terminated SrTiO{sub 3} (001) single crystals. By using in situ reflection high energy electron diffraction, low energy electron diffraction, x-ray photoemission spectroscopy, and scanning probe microscopy, we show that the stabilization of the anatase (001) phase is preceded by the growth of a few nanometers thick pseudomorphic Sr{sub x}TiO{sub 2+y} (x, y < 1) intermediate layer. The data demonstrate that the formation of this intermediate phase is related to the activation of a long range Sr migration from the SrTiO{sub 3} substrate into the film. Our results enrich the phase diagram of the Sr-Ti-O system under epitaxial strain opening a route for the study of the electronic and dielectric properties of the reported Sr-deficient SrTiO{sub 3} phase.
- OSTI ID:
- 22038648
- Journal Information:
- Journal of Chemical Physics, Vol. 135, Issue 3; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
Similar Records
Co-doped Anatase TiO₂ Heteroepitaxy on Si(001)
Transition Metal Doped TiO2 Thin Films Epitaxially Grown by Reactive Sputter Deposition
Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DIELECTRIC PROPERTIES
ELECTRON DIFFRACTION
ENERGY BEAM DEPOSITION
EPITAXY
FILMS
LASER RADIATION
LAYERS
MONOCRYSTALS
PHASE DIAGRAMS
PULSED IRRADIATION
SEMICONDUCTOR MATERIALS
STRONTIUM TITANATES
TITANIUM OXIDES
X RADIATION
X-RAY PHOTOELECTRON SPECTROSCOPY