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

Yingying Wu, Senfu Zhang, Junwei Zhang, Wei Wang, Yang Lin Zhu, Jin Hu, Gen Yin, Kin Wong, Chi Fang, Caihua Wan, Xiufeng Han, Qiming Shao, Takashi Taniguchi, Kenji Watanabe, Jiadong Zang, Zhiqiang Mao, Xixiang Zhang and Kang L. Wang ()
Additional contact information
Yingying Wu: University of California—Los Angeles
Senfu Zhang: King Abdullah University of Science and Technology
Junwei Zhang: King Abdullah University of Science and Technology
Wei Wang: Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University
Yang Lin Zhu: Pennsylvania State University
Jin Hu: University of Arkansas
Gen Yin: University of California—Los Angeles
Kin Wong: University of California—Los Angeles
Chi Fang: Chinese Academy of Sciences
Caihua Wan: Chinese Academy of Sciences
Xiufeng Han: Chinese Academy of Sciences
Qiming Shao: University of California—Los Angeles
Takashi Taniguchi: National Institute for Materials Science
Kenji Watanabe: National Institute for Materials Science
Jiadong Zang: University of New Hampshire
Zhiqiang Mao: Pennsylvania State University
Xixiang Zhang: King Abdullah University of Science and Technology
Kang L. Wang: University of California—Los Angeles

Nature Communications, 2020, vol. 11, issue 1, 1-6

Abstract: 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 WTe2/Fe3GeTe2 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.

Date: 2020
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DOI: 10.1038/s41467-020-17566-x

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