High-resolution study of (002, 113, 11-1) four-beam diffraction in Si.

IF 1.8 4区材料科学

Acta Crystallographica Section A Pub Date : 2012-05-01 Epub Date: 2012-04-17 DOI:10.1107/S0108767312012305

V G Kohn, A Kazimirov

引用次数: 4

Abstract

The results of a high-resolution study of the (002, 113, 11 ̅1) four-beam diffraction in Si are presented. The incident synchrotron radiation beam was highly monochromated and collimated with a multi-crystal arrangement in a dispersive setup in both vertical and horizontal planes, in an attempt to experimentally approach plane-wave incident conditions. The Renninger scheme was used with the forbidden reflection reciprocal-lattice vector 002 normal to the crystal surface. The azimuthal and polar rotations were performed in the crystal surface plane and the vertical plane correspondingly. The polar angular curves for various azimuthal angles were measured and found to be very close to theoretical computer simulations, with only a small deviation from the plane monochromatic wave. The effect of the strong two-beam 002 diffraction was observed for the first time with the maximum reflectivity close to 80%. The structure factor of the 002 reflection in Si was experimentally determined as zero.

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Si(002, 113, 11-1)四光束衍射的高分辨率研究。

本文报道了Si(002, 113, 11)四光束衍射的高分辨率研究结果。入射同步辐射光束高度单色化，并在垂直和水平面上的色散设置中以多晶排列准直，试图在实验上接近平面波入射条件。Renninger格式与禁止反射的互晶格向量002垂直于晶体表面。在晶体表面和垂直平面上分别进行了方位角旋转和极向旋转。测量了不同方位角的极角曲线，发现极角曲线与理论计算机模拟非常接近，与平面单色波只有很小的偏差。首次观察到强双光束002衍射的影响，最大反射率接近80%。通过实验确定了硅中002反射的结构因子为零。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Crystallographica Section A 化学-晶体学

自引率

11.10%

发文量

审稿时长

3 months

期刊介绍： Acta Crystallographica Section A: Foundations and Advances publishes articles reporting advances in the theory and practice of all areas of crystallography in the broadest sense. As well as traditional crystallography, this includes nanocrystals, metacrystals, amorphous materials, quasicrystals, synchrotron and XFEL studies, coherent scattering, diffraction imaging, time-resolved studies and the structure of strain and defects in materials. The journal has two parts, a rapid-publication Advances section and the traditional Foundations section. Articles for the Advances section are of particularly high value and impact. They receive expedited treatment and may be highlighted by an accompanying scientific commentary article and a press release. Further details are given in the November 2013 Editorial. The central themes of the journal are, on the one hand, experimental and theoretical studies of the properties and arrangements of atoms, ions and molecules in condensed matter, periodic, quasiperiodic or amorphous, ideal or real, and, on the other, the theoretical and experimental aspects of the various methods to determine these properties and arrangements.