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
	2020-08-01
卷号	19 期号:8 页码:881-886
关键词	Ferroelectricity Ferromagnetic materials Lead titanate Morphology Nanotechnology Samarium compounds Textures Titanium compounds Topology Ultrathin films Core region Engineering strains Epitaxial strain Non-coplanar structure Order parameter Phase-field simulation Spin interaction Topological charges
ISSN号	14761122
DOI	10.1038/s41563-020-0694-8
英文摘要	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. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
出版者	Nature Research
WOS记录号	WOS:000537030200001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115526]
专题	兰州理工大学材料科学与工程学院
作者单位	1.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China; 2.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China; 3.School of Materials Science and Engineering, University of Science and Technology of China, Hefei, China; 4.State Key Laboratory of Advanced Processing and Recycling on Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou, 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):881-886.
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),881-886.
MLA	Wang, Y.J.,et al."Polar meron lattice in strained oxide ferroelectrics".Nature Materials 19.8(2020):881-886.