Study of the topmost surface structure of a y-cut LiNbO₃ single crystal with coaxial impact collision ion scattering spectroscopy (CAICISS)

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• 作者：Yamada ; Takashi ; Choso ; Tetsuo ; et. al.
• 关键词：61.18.Bn ; 68.35.-p ; LiNbO₃ ; Coaxial impact collision ion scattering spectroscopy (CAICISS) ; Single crystal surface ; Surface structure
• 刊名：Applied Surface Science
• 出版年：2001
• 期刊代码：6_01694332
• 类别：ms
• 出版时间：February 1, 2001
• 卷：171
• 期：1-2
• 页码：106-112
• 文件大小：263 K

摘要

The topmost surface structures of a y-cut LiNbO₃ single crystal were studied with coaxial impact collision ion scattering spectroscopy (CAICISS). The observed CAICISS spectra of the azimuthal intensity variation of Nb atoms of that had mirror plane symmetry which was unexpected from the space group of LiNbO₃ (R3c, C_3v⁶) itself. By the simulation of CAICISS, it was strongly suggested that Nb atoms at the topmost few layers of y-cut LiNbO₃ single crystal were rearranged to give a mirror plane of symmetry in their three-dimensional atomic configuration rather than to form other related oxides.