Lattice relaxation of ZnO single crystal (0001) surface

Hideyuki Maki, Noboru Ichinose, Naoki Ohashi, Hajime Haneda, Junzo Tanaka

研究成果: Article査読

35 被引用数 (Scopus)

抄録

Wurtzite-type ZnO is a polar crystal whose (0001) surface is terminated by Zn ions. The ZnO single crystals were etched for the surfaces to have regular step/terrace structures and analyzed by reflection high-energy electron diffraction (RHEED) and coaxial impact-collision ion scattering spectroscopy (CAICISS). RHEED patterns showed that the surface had a 1×1 structure. From the polar angle dependence of CAICISS time-of-flight spectra for Zn ions, a peak due to a focusing effect for fifth-layer Zn ions by the first-layer Zn ions was observed at 49.5°, which was 2° higher than the corresponding angle simulated for a non-relaxed surface. These results indicated that the uppermost Zn ions were surface-normally relaxed toward the outside of the surface by about 7% of the c-axis lattice constant.

本文言語English
ページ(範囲)377-382
ページ数6
ジャーナルSurface Science
457
3
DOI
出版ステータスPublished - 2000 6月 10
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 表面および界面
  • 表面、皮膜および薄膜
  • 材料化学

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