Moire fringe imaging of heterostructures by scanning transmission electron microscopy

doi:10.1016/j.micron.2024.103679

IMR OpenIR

	Moire fringe imaging of heterostructures by scanning transmission electron microscopy
	Hu, Wen-Tao ; Tian, Min 3; Wang, Yu-Jia 1,2; Zhu, Yin-Lian 4,5
通讯作者	Wang, Yu-Jia(yjwang@imr.ac.cn) ; Zhu, Yin-Lian(zhuyinlian@sslab.org.cn)
	2024-10-01
发表期刊	MICRON
ISSN	0968-4328
卷号	185 页码:13
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.
关键词	Scanning transmission electron microscopy Moire fringes Coherent scattering Incoherent imaging Heterostructure
资助者	National Natural Science Foundation of China ; Shenyang National Laboratory for Materials Science ; Youth Innovation Promotion Association CAS
DOI	10.1016/j.micron.2024.103679
收录类别	SCI
语种	英语
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
WOS类目	Microscopy
WOS记录号	WOS:001260498200001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/187633
专题	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.