Dipolar wavevector interference induces a polar skyrmion lattice in strained BiFeO<sub>3</sub> films

doi:10.1038/s41565-024-01845-5

IMR OpenIR

	Dipolar wavevector interference induces a polar skyrmion lattice in strained BiFeO₃ films
	Geng, W. R.1; Zhu, Y. L.1,2,3; Zhu, M. X.2,4; Tang, Y. L.2; Zhao, H. J.5; Lei, C. H.6; Wang, Y. J.2; Wang, J. H.2,4; Jiang, R. J.2,4; Liu, S. Z.2,4; San, X. Y.7; Feng, Y. P.1; Zou, M. J.1; Ma, X. L.1,8,9
通讯作者	Ma, X. L.(xlma@iphy.ac.cn)
	2025-01-16
发表期刊	NATURE NANOTECHNOLOGY
ISSN	1748-3387
页码	18
摘要	Skyrmions can form regular arrangements, so-called skyrmion crystals (SkXs). A mode with multiple wavevectors q then describes the arrangement. While magnetic SkXs, which can emerge in the presence of Dzyaloshinskii-Moriya interaction, are well established, polar skyrmion lattices are still elusive. Here we report the observation of polar SkXs with a well-defined double-q state in ultrathin BiFeO3 films on LaAlO3. The compressive strain induced by the LaAlO3 substrate yields a dipolar topological texture with a periodic arrangement of skyrmions. The square-like superstructure with a lattice constant of 2.68 nm features a periodic modulation of polarization fields and topological charge density. The film furthermore exhibits an enhanced electromechanical response with an increased converse piezoelectric coefficient (d33) compared with SkX-free films. Transmission electron microscopy experiments in combination with phase-field simulations indicate that the dipole skyrmion texture results from the interference of two orthogonal single-q dipole patterns. We anticipate that the interference of multiple wavevectors may lead to a diversity of topological crystals with a variety of symmetries and lattice constants.
资助者	(1) Funder: the Key Research Program of Frontier Sciences CAS; Grant Reference Number: QYZDJ-SSW-JSC010; (2) Funder: Shenyang National Laboratory for Materials Science; Grant Reference Number: L2019R06; ; National Natural Science Foundation of China ; Guangdong Basic and Applied Basic Research Foundation ; China Postdoctoral Science Foundation ; Guangdong Provincial Quantum Science Strategic Initiative ; Key Research Program of Frontier Sciences CAS ; Shenyang National Laboratory for Materials Science ; Scientific Instrument Developing Project of CAS ; Youth Innovation Promotion Association of CAS ; Youth Innovation Promotion Association CAS
DOI	10.1038/s41565-024-01845-5
收录类别	SCI
语种	英语
资助项目	(1) Funder: the Key Research Program of Frontier Sciences CAS; Grant Reference Number: QYZDJ-SSW-JSC010; (2) Funder: Shenyang National Laboratory for Materials Science; Grant Reference Number: L2019R06;[52201018] ; (1) Funder: the Key Research Program of Frontier Sciences CAS; Grant Reference Number: QYZDJ-SSW-JSC010; (2) Funder: Shenyang National Laboratory for Materials Science; Grant Reference Number: L2019R06;[51971223] ; (1) Funder: the Key Research Program of Frontier Sciences CAS; Grant Reference Number: QYZDJ-SSW-JSC010; (2) Funder: Shenyang National Laboratory for Materials Science; Grant Reference Number: L2019R06;[51922100] ; (1) Funder: the Key Research Program of Frontier Sciences CAS; Grant Reference Number: QYZDJ-SSW-JSC010; (2) Funder: Shenyang National Laboratory for Materials Science; Grant Reference Number: L2019R06;[52122101] ; National Natural Science Foundation of China[2021A1515110291] ; National Natural Science Foundation of China[2023A1515012796] ; Guangdong Basic and Applied Basic Research Foundation[2022T150690] ; China Postdoctoral Science Foundation[GDZX2202001] ; China Postdoctoral Science Foundation[GDZX2302001] ; China Postdoctoral Science Foundation[GDZX2402001] ; Guangdong Provincial Quantum Science Strategic Initiative[QYZDJ-SSW-JSC010] ; Key Research Program of Frontier Sciences CAS[L2019R06] ; Key Research Program of Frontier Sciences CAS[L2019R08] ; Key Research Program of Frontier Sciences CAS[L2019F01] ; Key Research Program of Frontier Sciences CAS[L2019F13] ; Shenyang National Laboratory for Materials Science[YJKYYQ20200066] ; Scientific Instrument Developing Project of CAS[Y202048] ; Youth Innovation Promotion Association of CAS[2021187] ; Youth Innovation Promotion Association CAS
WOS研究方向	Science & Technology - Other Topics ; Materials Science
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:001398675900001
出版者	NATURE PORTFOLIO
引用统计	被引频次：4[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/321006/180137
专题	中国科学院金属研究所
通讯作者	Ma, X. L.
作者单位	1.Songshan Lake Mat Lab, Bay Area Ctr Electron Microscopy, Dongguan, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Peoples R China 3.Hunan Univ Sci & Technol, Xiangtan, Peoples R China 4.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Peoples R China 5.Jilin Univ, Coll Phys, Key Lab Mat Simulat Methods & Software, Minist Educ, Changchun, Peoples R China 6.Univ Scranton, Dept Phys & Engn, Scranton, PA USA 7.Hebei Univ, Coll Phys Sci & Technol, Hebei Key Lab Opt Elect Informat & Mat, Baoding, Peoples R China 8.Chinese Acad Sci, Inst Phys, Beijing, Peoples R China 9.Quantum Sci Ctr Guangdong Hong Kong Macau Greater, Shenzhen, Peoples R China
推荐引用方式 GB/T 7714	Geng, W. R.,Zhu, Y. L.,Zhu, M. X.,et al. Dipolar wavevector interference induces a polar skyrmion lattice in strained BiFeO₃ films[J]. NATURE NANOTECHNOLOGY,2025:18.
APA	Geng, W. R..,Zhu, Y. L..,Zhu, M. X..,Tang, Y. L..,Zhao, H. J..,...&Ma, X. L..(2025).Dipolar wavevector interference induces a polar skyrmion lattice in strained BiFeO₃ films.NATURE NANOTECHNOLOGY,18.
MLA	Geng, W. R.,et al."Dipolar wavevector interference induces a polar skyrmion lattice in strained BiFeO₃ films".NATURE NANOTECHNOLOGY (2025):18.