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Moire fringe imaging of heterostructures by scanning transmission electron microscopy

文献类型：期刊论文

作者Hu, Wen-Tao; Tian, Min3; Wang, Yu-Jia1,2; Zhu, Yin-Lian4,5
刊名MICRON
出版日期2024-10-01
卷号185页码:13
关键词Scanning transmission electron microscopy Moire fringes Coherent scattering Incoherent imaging Heterostructure
ISSN号0968-4328
DOI10.1016/j.micron.2024.103679
通讯作者Wang, Yu-Jia(yjwang@imr.ac.cn) ; Zhu, Yin-Lian(zhuyinlian@sslab.org.cn)
英文摘要A heterostructured crystalline bilayer specimen is known to produce moire fringes (MFs) in the conventional transmission electron microscopy (TEM). However, the understanding of how these patterns form in scanning transmission electron microscopy (STEM) remains limited. Here, we extended the double-scattering model to establish the imaging theory of MFs in STEM for a bilayer sample and applied this theory to successfully explain both experimental and simulated STEM images of a perovskite PbZrO3/SrTiO3 system. Our findings demonstrated that the wave vectors of electrons exiting from Layer-1 and their relative positions with the atomic columns of Layer-2 should be taken into account. The atomic column misalignment leads to a faster reduction in the intensity of the secondary scattering beam compared to the single scattering beam as the scattering angle increases. Consequently, the intensity distribution of MFs in the bright field (BF)-STEM can be still described as the product of two single atomic images. However, in high angle annular dark field (HAADF)-STEM, it is approximately described as the superposition of the two images. Our work not only fills a knowledge gap of MFs in incoherent imaging, but also emphasizes the importance of the coherent scattering restricted by the real space when analyzing the HAADF-STEM imaging.
资助项目National Natural Science Foundation of China[52122101] ; National Natural Science Foundation of China[51971223] ; Shenyang National Laboratory for Materials Science[L2019R08] ; Shenyang National Laboratory for Materials Science[L2019F13] ; Youth Innovation Promotion Association CAS[2021187]
WOS研究方向Microscopy
语种英语
WOS记录号WOS:001260498200001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; Shenyang National Laboratory for Materials Science ; Youth Innovation Promotion Association CAS
源URL  
专题金属研究所_中国科学院金属研究所
通讯作者Wang, Yu-Jia; Zhu, Yin-Lian
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Jihua Lab, Foshan 528200, Peoples R China
4.Songshan Lake Mat Lab, Bay Area Ctr Electron Microscopy, Dongguan 523808, Peoples R China
5.Hunan Univ Sci & Technol, Sch Mat Sci & Engn, Xiangtan 411201, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Wen-Tao,Tian, Min,Wang, Yu-Jia,et al. Moire fringe imaging of heterostructures by scanning transmission electron microscopy[J]. MICRON,2024,185:13.
APA Hu, Wen-Tao,Tian, Min,Wang, Yu-Jia,&Zhu, Yin-Lian.(2024).Moire fringe imaging of heterostructures by scanning transmission electron microscopy.MICRON,185,13.
MLA Hu, Wen-Tao,et al."Moire fringe imaging of heterostructures by scanning transmission electron microscopy".MICRON 185(2024):13.

入库方式： OAI收割

来源：金属研究所

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