Direct Observation of Large-Scale Screw Dislocation Grids in Oxide Heteroepitaxies

doi:10.1021/acs.nanolett.2c00030

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	Direct Observation of Large-Scale Screw Dislocation Grids in Oxide Heteroepitaxies
	Chen, Yuting 4,5; Tang, Yunlong 5; Gong, Fenghui 4,5; Wu, Bo 2,3; Han, Mengjiao 2,3; Zou, Minjie 2,3; Feng, Yanpeng 2,3; Wang, Yujia 5; Zhu, Yinlian 3,5; Ma, Xiuliang 1,5
刊名	NANO LETTERS
	2022-03-09
卷号	22 期号:5 页码:2085-2093
关键词	Screw dislocation grids twist boundaries oxide heteroepitaxies shear strain transmission electron microscopy
ISSN号	1530-6984
DOI	10.1021/acs.nanolett.2c00030
通讯作者	Zhu, Yinlian(ylzhu@imr.ac.cn)
英文摘要	Screw dislocation is important not only for understanding plastic deformation of crystals but also for optical and electrical properties of materials. However, characterizations of screw dislocations are still challenging since there is almost no atom distortion when viewed along the dislocation line. In particular, although it is theoretically known that shear strains in heteroepitaxy systems may be relaxed via screw dislocation grids, the specific structures and thickness-dependent evolutions of these grids are still largely unknown. Here, by using orthorhombic [001]-oriented DyScO3 substrates we have directly observed large-scale screw dislocation grids in the DyScO3/BiFeO3 oxide heteroepitaxies exhibiting large shear strain. Pure screw dislocations with a[100] and a[010] Burgers vectors were confirmed by multiscale transmission electron microscopy study. Our results directly confirm screw dislocation grids as a factor to tailor shear strains in epitaxial systems and suggest a practical platform for studying structures and induced responses corresponding to screw dislocations.
资助项目	National Natural Science Foundation of China[51971223] ; National Natural Science Foundation of China[51922100] ; National Natural Science Foundation of China[52122101] ; Key Research Program of Frontier Sciences CAS[QYZDJSSW-JSC010] ; Shenyang National Laboratory for Materials Science[L2019R06] ; Shenyang National Laboratory for Materials Science[L2019R08] ; Shenyang National Laboratory for Materials Science[L2019F01] ; Shenyang National Laboratory for Materials Science[L2019F13] ; Scientific Instrument Developing Project of CAS[YJKYYQ20200066] ; Youth Innovation Promotion Association CAS[2021187] ; Youth Innovation Promotion Association CAS[Y202048] ; China National Postdoctoral Program for Innovative Talents[BX2021348] ; China Postdoctoral Science Foundation[2021M703455]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000795031700034
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences CAS ; Shenyang National Laboratory for Materials Science ; Scientific Instrument Developing Project of CAS ; Youth Innovation Promotion Association CAS ; China National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174056]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhu, Yinlian
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 2.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 3.Songshan Lake Mat Lab, Bay Area Ctr Electron Microscopy, Dongguan 523808, Guangdong, Peoples R China 4.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yuting,Tang, Yunlong,Gong, Fenghui,et al. Direct Observation of Large-Scale Screw Dislocation Grids in Oxide Heteroepitaxies[J]. NANO LETTERS,2022,22(5):2085-2093.
APA	Chen, Yuting.,Tang, Yunlong.,Gong, Fenghui.,Wu, Bo.,Han, Mengjiao.,...&Ma, Xiuliang.(2022).Direct Observation of Large-Scale Screw Dislocation Grids in Oxide Heteroepitaxies.NANO LETTERS,22(5),2085-2093.
MLA	Chen, Yuting,et al."Direct Observation of Large-Scale Screw Dislocation Grids in Oxide Heteroepitaxies".NANO LETTERS 22.5(2022):2085-2093.