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Initial Stages of High-Temperature CaF2/Si(001) Epitaxial Growth Studied by Surface X-Ray Diffraction

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Surface X-ray diffraction was applied to study structure of the fluorite-silicon interface forming upon epitaxial growth of CaF2 on Si(001) surface kept at 750 °C. Samples with CaF2 coverage of 1.5–4 (110)-monolayers were grown and in-situ characterized using synchrotron radiation. The 3 × 1-like surface reconstruction was observed in agreement with the previous studies by electron diffraction. Interestingly, a well pronounced splitting of the fractional × 1/3 reflections was revealed. This splitting was ascribed to the effect of antiphase domain boundaries in the row-like structure of the interface layer. The in-plane integrated intensities were used to reconstruct two-dimensional atomic structure of the high-temperature CaF2/Si(001) interface.
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Keywords: ANTIPHASE DOMAINS; CALCIUM FLUORIDE; INTERFACE STRUCTURE; NANOSTRIPES; SURFACE X-RAY DIFFRACTION

Document Type: Research Article

Publication date: 2011-04-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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