Effect of oxygen deficiency on SrTiO 3(001) surface reconstructions

Ryota Shimizu, Katsuya Iwaya, Takeo Ohsawa, Susumu Shiraki, Tetsuya Hasegawa, Tomihiro Hashizume, Taro Hitosugi

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    32 Citations (Scopus)

    Abstract

    The contribution of oxygen deficiencies to SrTiO 3(001) surface reconstructions is studied using low-energy electron diffraction and scanning tunneling microscopy. We have prepared a SrTiO 3 sample with spatially graded oxygen deficiencies, in which R 33.7 °-(√13 × √13), (2 × 1), and R 26.6°-(√5 × √5) surface reconstructions are observed while increasing the amount of oxygen deficiencies. This indicates that oxygen nonstoichiometry has an influence on the formation of various surface reconstructions as one of the important factors. This concept is also applicable to other transition metal oxides to prepare atomically ordered surfaces in a reproducible manner.

    Original languageEnglish
    Article number263106
    JournalApplied Physics Letters
    Volume100
    Issue number26
    DOIs
    Publication statusPublished - 2012 Jun 25

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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