NUMERICAL CONVERGENCE OF DYNAMIC CALCULATIONS OF REFLECTION HIGH-ENERGY ELECTRON-DIFFRACTION INTENSITIES

被引:32
作者
ICHIMIYA, A
机构
[1] Department of Applied Physics, School of Engineering, Nagoya University, Chikusa-ku, Nagoya
关键词
D O I
10.1016/0039-6028(90)90108-K
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Numerical convergence of multi-slice dynamical calculations of reflection high-energy electron diffraction (RHEED) intensities for numbers of slices, atomic layers and beams is reported for a Ag(001) surface. Criterions of the convergence for numbers of slices and atomic layers are delivered by a thermal vibration amplitude of atoms and an electron absorption coefficient, respectively. From comparison of the curves of 11-beam calculation for the zeroth Laue zone and those of 61-beam calculation with higher order Laue zones, it is revealed that low-order RHEED intensities obtained by the 11-beam calculation are not significantly different from those of the 61-beam calculation. Therefore, calculated RHEED intensities for the zeroth Laue zone spots are obtained well by dynamical calculation with a beam set in only the zeroth Laue zone. Effects of the Debye-Waller factor on RHEED intensities of higher order Laue zones are also discussed. © 1990.
引用
收藏
页码:75 / 83
页数:9
相关论文
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