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arXiv 1702.03003cond-mat.mtrl-sciphysics.ins-det
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III族氮化物金属有机气相外延的先进原位X射线研究仪器

An instrument for advanced in situ x-ray studies of metal-organic vapor phase epitaxy of III-nitrides

Guangxu Ju, Matthew J. Highland, Angel Yanguas-Gil, Carol Thompson, Jeffrey A. Eastman, Hua Zhou, Sean M. Brennan, G. Brian Stephenson, Paul H. Fuoss

摘要:

我们描述了一种仪器,利用正在进行的革命同步辐射源,光学,和探测器,使原位研究的金属有机气相外延(MOVPE)生长的III族氮化物材料,使用相干X射线方法。该系统包括高分辨率定位的样品和检测器,包括完整的旋转,一个X射线透明室壁的入射和衍射光束访问在一个很宽的角度范围内,和最小的热样品运动,使亚微米的位置稳定性和再现性所需的相干X射线研究。该仪器使表面X射线光子相关光谱,微束衍射和相干衍射成像的原子尺度的表面和薄膜结构和生长过程中的动态,提供MOVPE过程的基本理解。

英文摘要:

We describe an instrument that exploits the ongoing revolution in synchrotron sources, optics, and detectors to enable in situ studies of metal-organic vapor phase epitaxy (MOVPE) growth of III-nitride materials using coherent x-ray methods. The system includes high-resolution positioning of the sample and detector including full rotations, an x-ray transparent chamber wall for incident and diffracted beam access over a wide angular range, and minimal thermal sample motion, giving the sub-micron positional stability and reproducibility needed for coherent x-ray studies. The instrument enables surface x-ray photon correlation spectroscopy, microbeam diffraction, and coherent diffraction imaging of atomic-scale surface and film structure and dynamics during growth, to provide fundamental understanding of MOVPE processes.

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