Reflection high-energy electron diffraction (RHEED) is a powerful tool for characterizing crystal surface structures. However, the setup geometry leads to distorted and complicated patterns, which are not straightforward to link to the real-space structures. A program with a graphical user interface is provided here to simulate the RHEED patterns. Following the Ewald construction in the kinematic theory, we find out the exact geometric transformation in this model that determines the positions of diffraction spots. The program can deal with many forms of surface structures, including surface reconstructions or domains. The simulations exhibit great agreement with the experimental results in various cases. This program will benefit the structure analysis in thin film growth and surface science studies.
@article{arxiv.2207.06642,
title = {Realistic simulation of reflection high-energy electron diffraction patterns for two-dimensional lattices using Ewald construction},
author = {Chong Liu and Kai Chang and Ke Zou},
journal= {arXiv preprint arXiv:2207.06642},
year = {2022}
}
Comments
15 pages, 5 figures. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Journal of Vacuum Science & Technology B