title: Initial stages of high-temperature CaF2/Si(001) epitaxial growth studied by surface X-ray diffraction.
abstract: 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 degrees C. Samples with CaF2 coverage of 1.5-4 (110)-monolayers were grown and in-situ characterized using synchrotron radiation. The 3 x 1-like surface reconstruction was observed in agreement with the previous studies by electron diffraction. Interestingly, a well pronounced splitting of the fractional x 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.
authors.affiliation: Ioffe Institute, Solid State Optics Department, St. Petersburg 194021, Russian Federation.
authors.forename: Sergey M
authors.initials: SM
authors.lastname: Suturin
authors.forename: Nikolai S
authors.initials: NS
authors.lastname: Sokolov
authors.forename: Aleksander G
authors.initials: AG
authors.lastname: Banshchikov
authors.forename: Reginald N
authors.initials: RN
authors.lastname: Kyutt
authors.forename: Osami
authors.initials: O
authors.lastname: Sakata
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Shimura
authors.forename: Jimpei
authors.initials: J
authors.lastname: Harada
authors.forename: Masao
authors.initials: M
authors.lastname: Tabuchi
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Takeda
mesh_terms: D002124:Calcium Fluoride / Q000737:chemistry*; D006358:Hot Temperature; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties; D014961:X-Ray Diffraction / Q000379:methods*
chemical_list: D046911:Macromolecular Substances; D002124:Calcium Fluoride; D012825:Silicon