Polar meron lattice in strained oxide ferroelectrics

doi:10.1038/s41563-020-0694-8

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	Polar meron lattice in strained oxide ferroelectrics
	Wang, Y. J.1; Feng, Y. P.1,2; Zhu, Y. L.1; Tang, Y. L.1; Yang, L. X.1; Zou, M. J.1,3; Geng, W. R.1,3; Han, M. J.1,2; Guo, X. W.1,3; Wu, B.1
刊名	NATURE MATERIALS
	2020-06-01
卷号	19 期号:8 页码:18
ISSN号	1476-1122
DOI	10.1038/s41563-020-0694-8
通讯作者	Zhu, Y. L.(ylzhu@imr.ac.cn) ; Ma, X. L.(xlma@imr.ac.cn)
英文摘要	Merons are topological structures, but these have yet to be directly observed in ferroelectrics. Here, by epitaxially straining PbTiO3 on a SmScO3 substrate, electron microscopy and phase-field modelling allow the morphology and distribution of merons to be observed. A topological meron features a non-coplanar structure, whose order parameters in the core region are perpendicular to those near the perimeter. A meron is half of a skyrmion, and both have potential applications for information carrying and storage. Although merons and skyrmions in ferromagnetic materials can be readily obtained via inter-spin interactions, their behaviour and even existence in ferroelectric materials are still elusive. Here we observe using electron microscopy not only the atomic morphology of merons with a topological charge of 1/2, but also a periodic meron lattice in ultrathin PbTiO3 films under tensile epitaxial strain on a SmScO3 substrate. Phase-field simulations rationalize the formation of merons for which an epitaxial strain, as a single alterable parameter, plays a critical role in the coupling of lattice and charge. This study suggests that by engineering strain at the nanoscale it should be possible to fabricate topological polar textures, which in turn could facilitate the development of nanoscale ferroelectric devices.
资助项目	Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010] ; National Natural Science Foundation of China[51671194] ; National Natural Science Foundation of China[51971223] ; National Natural Science Foundation of China[51922100] ; 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] ; Youth Innovation Promotion Association CAS[2016177]
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000537030200001
资助机构	Key Research Program of Frontier Sciences CAS ; National Natural Science Foundation of China ; Shenyang National Laboratory for Materials Science ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/139166]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhu, Y. L.; Ma, X. L.
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang, Peoples R China 2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei, Peoples R China 4.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Wang, Y. J.,Feng, Y. P.,Zhu, Y. L.,et al. Polar meron lattice in strained oxide ferroelectrics[J]. NATURE MATERIALS,2020,19(8):18.
APA	Wang, Y. J..,Feng, Y. P..,Zhu, Y. L..,Tang, Y. L..,Yang, L. X..,...&Ma, X. L..(2020).Polar meron lattice in strained oxide ferroelectrics.NATURE MATERIALS,19(8),18.
MLA	Wang, Y. J.,et al."Polar meron lattice in strained oxide ferroelectrics".NATURE MATERIALS 19.8(2020):18.