Atomic Control of the SrTiO 3 Crystal Surface
- 2 December 1994
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 266 (5190) , 1540-1542
- https://doi.org/10.1126/science.266.5190.1540
Abstract
The atomically smooth SrTiO3 (100) with steps one unit cell in height was obtained by treating the crystal surface with a pH-controlled NH4F-HF solution. The homoepitaxy of SrTiO3 film on the crystal surface proceeds in a perfect layer-by-layer mode as verified by reflection high-energy electron diffraction and atomic force microscopy. Ion scattering spectroscopy revealed that the TiO2 atomic plane terminated the as-treated clean surface and that the terminating atomic layer could be tuned to the SrO atomic plane by homooepitaxial growth. This technology provides a well-defined substrate surface for atomically regulated epitaxial growth of such perovskite oxide films as YBa2Cu3O7-δ.Keywords
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