Atomically resolved surface structure of SrTiO3(001) thin films grown in step-flow mode by pulsed laser deposition

Katsuya Iwaya, Takeo Ohsawa, Ryota Shimizu, Tomihiro Hashizume, Taro Hitosugi

    研究成果: Article査読

    15 被引用数 (Scopus)

    抄録

    The surface structure of SrTiO3(001) thin films homoepitaxially grown in step-flow mode by pulsed laser deposition was characterized using scanning tunneling microscopy. One-dimensional (1D) TiOx -based nanostructures were formed on the surface, and their density increased with increasing film thickness. Most of the 1D nanostructures disappeared after post-deposition annealing, and the resulting surface exhibited a domain structure with (2 × 1) and (1 × 2) reconstructions and fewer oxygen vacancies. These results imply that the step-flow growth is likely to produce a TiOx -rich surface and Ti deficiencies in the film, and that annealing can effectively reduce the density of atomic defects.

    本文言語English
    論文番号075701
    ジャーナルApplied Physics Express
    3
    7
    DOI
    出版ステータスPublished - 2010 7

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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