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Néel-type skyrmion in WTe2/Fe3GeTe2 van der Waals heterostructure

Yingying WuDepartment of Electrical and Computer Engineering, University of California-Los Angeles, Los Angeles, CA, 90095, USASenfu ZhangPhysical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi ArabiaJunwei ZhangPhysical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi ArabiaWei WangKey Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, ChinaYang Lin ZhuDepartment of Physics, Pennsylvania State University, University Park, PA, 16802, USAJin HuDepartment of Physics, University of Arkansas, Fayetteville, AR, 72701, USAGen YinDepartment of Electrical and Computer Engineering, University of California-Los Angeles, Los Angeles, CA, 90095, USAKin WongDepartment of Electrical and Computer Engineering, University of California-Los Angeles, Los Angeles, CA, 90095, USAChi FangInstitute of Physics, Chinese Academy of Sciences, Beijing, 100190, ChinaCaihua WanInstitute of Physics, Chinese Academy of Sciences, Beijing, 100190, ChinaXiufeng HanInstitute of Physics, Chinese Academy of Sciences, Beijing, 100190, ChinaQiming ShaoDepartment of Electrical and Computer Engineering, University of California-Los Angeles, Los Angeles, CA, 90095, USATakashi TaniguchiNational Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, JapanKenji WatanabeNational Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, JapanJiadong ZangDepartment of Physics and Astronomy, University of New Hampshire, Durham, NH, 03824, USAZhiqiang MaoDepartment of Physics, Pennsylvania State University, University Park, PA, 16802, USAXixiang ZhangPhysical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi ArabiaKang L. WangDepartment of Electrical and Computer Engineering, University of California-Los Angeles, Los Angeles, CA, 90095, USA. [email protected]

2020en

ABI

Annotatsiya

Abstract The promise of high-density and low-energy-consumption devices motivates the search for layered structures that stabilize chiral spin textures such as topologically protected skyrmions. At the same time, recently discovered long-range intrinsic magnetic orders in the two-dimensional van der Waals materials provide a new platform for the discovery of novel physics and effects. Here we demonstrate the Dzyaloshinskii–Moriya interaction and Néel-type skyrmions are induced at the WTe 2 /Fe 3 GeTe 2 interface. Transport measurements show the topological Hall effect in this heterostructure for temperatures below 100 K. Furthermore, Lorentz transmission electron microscopy is used to directly image Néel-type skyrmion lattice and the stripe-like magnetic domain structures as well. The interfacial coupling induced Dzyaloshinskii–Moriya interaction is estimated to have a large energy of 1.0 mJ m −2 . This work paves a path towards the skyrmionic devices based on van der Waals layered heterostructures.

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DOI: 10.1038/s41467-020-17566-x

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