Surface structure of MBE-grown α-Fe2O3(0001) by intermediate-energy X-ray photoelectron diffraction

S. Thevuthasan, Y. J. Kim, S. I. Yi, S. A. Chambers, J. Morais, R. Denecke, C. S. Fadley, P. Liu, T. Kendelewicz, G. E. Brown

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    Abstract

    We have used intermediate-energy X-ray photoelectron diffraction to determine the surface structure of epitaxial α-Fe2O3(0001) grown on α-Al2O3(0001). Comparison of experiment with quantum mechanical scattering theory reveals that the surface is Fe-terminated, and that the first four layer spacings are -41, +18, -8, and 47% of the associated bulk values, respectively. These results agree reasonably well with the predictions of molecular mechanics and spin-density functional theory previously reported in the literature for the Fe-terminated surface. However, we find no evidence for an O-terminated surface predicted to be stable by spin-density functional theory.

    Original languageEnglish
    Pages (from-to)276-286
    Number of pages11
    JournalSurface Science
    Volume425
    Issue number2
    DOIs
    Publication statusPublished - 20 Apr 1999

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    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Materials Chemistry

    Cite this

    Thevuthasan, S., Kim, Y. J., Yi, S. I., Chambers, S. A., Morais, J., Denecke, R., Fadley, C. S., Liu, P., Kendelewicz, T., & Brown, G. E. (1999). Surface structure of MBE-grown α-Fe2O3(0001) by intermediate-energy X-ray photoelectron diffraction. Surface Science, 425(2), 276-286. https://doi.org/10.1016/S0039-6028(99)00200-9