Atomic and electronic structure of [0001]/(1̄2̄30) ∑7 symmetric tilt grain boundary in ZnO bicrystal with linear current-voltage characteristic

Y. Sato, T. Mizoguchi, F. Oba, M. Yodogawa, T. Yamamoto, Y. Ikuhara

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    29 Citations (Scopus)

    Abstract

    The atomic and electronic structures of [0001]/(1̄2̄30) ∑ 7 symmetric tilt grain boundary in an undoped ZnO bicrystal were investigated by high-resolution transmission electron microscopy (HRTEM) and first-principles calculations. HRTEM imaging and atomistic calculations revealed that the grain boundary was composed of at least two types of structural units. It was also found that one of the structural units has two threefold-coordinated atoms per a unit and the other has two fivefold-coordinated atoms. First-principles calculations indicated that these atoms with various coordination numbers do not form deep unoccupied electronic states in the band gap of ZnO, which is in consistency with a linear current-voltage characteristic observed for the bicrystal with the ∑ 7 boundary.

    Original languageEnglish
    Pages (from-to)3059-3066
    Number of pages8
    JournalJournal of Materials Science
    Volume40
    Issue number12
    DOIs
    Publication statusPublished - 2005 Jun 1

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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