Negligible Sr segregation on SrTiO3(001)-(√13 × √13)- R 33.7°reconstructed surfaces

Takeo Ohsawa, Ryota Shimizu, Katsuya Iwaya, Susumu Shiraki, Taro Hitosugi

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    We compare the extent of Sr segregation on buffered-HF (BHF)-etched and (√13× √13)-R33.7°reconstructed SrTiO3(001) surfaces, and reveal that Sr segregation is suppressed on the reconstructed surface. Scanning tunneling microscopy and photoemission studies of both surfaces show distinct differences in terms of atomic arrangements, electronic structures, and chemical states. The emission-angle-dependent Sr 3d core-level spectra indicate that the amount of Sr is low at the surface of the reconstructed surfaces, while the amount increases near the surface of the BHF-etched surface. Our investigations would facilitate the preparation of a compositionally well-defined SrTiO3 surface that is of significant importance to accelerate oxide electronics research.

    Original languageEnglish
    Article number161603
    JournalApplied Physics Letters
    Volume108
    Issue number16
    DOIs
    Publication statusPublished - 2016 Apr 18

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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