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Néel-type skyrmion in WTe<sub>2</sub>/Fe<sub>3</sub>GeTe<sub>2</sub> van der Waals heterostructure

ORAL

Abstract

Topologically protected skyrmions are highly promising for spintronic devices and applications. Recently, long-range intrinsic magnetic orders in the van der Waals materials provide a new platform for the discovery of novel physics and phenomena. In this work, we demonstrate the Dzyaloshinskii-Moriya interaction and Néel-type skyrmions are induced at the WTe2/Fe3GeTe2 interface, a van der Waals heterostructure. Topological Hall effect has been observed in this heterostructure for temperatures below 100 K. In addition, we use Lorentz transmission electron microscopy and successfully obtain images of Néel-type skyrmion lattice and the stripe-like magnetic domain structures. These are direct evidence for the skyrmions. Furthermore, we estimate interfacial coupling induced Dzyaloshinskii-Moriya interaction in this system, which has a large energy of 1.0 mJm-2. This work first time points out a new direction of spintronics in van der Waals layered heterostructures.

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Presenters

  • Yingying Wu

    University of California, Los Angeles, Department of Electrical and Computer Engineering, University of California, Los Angeles

Authors

  • Yingying Wu

    University of California, Los Angeles, Department of Electrical and Computer Engineering, University of California, Los Angeles

  • Senfu Zhang

    KAUST

  • junwei zhang

    KAUST

  • Gen Yin

    University of California, Los Angeles

  • Zhiqiang Mao

    Pennsylvania State University, Department of Physics, Penn State University, The Pennsylvania State University, Penn State University, Physics, Penn State University, Department of Physics, Pennsylvania State University, Department of Physics, The Pennsylvania State University, Physics, The Pennsylvania State University, Physics, Pennsylvania State University, Department of Materials Science and Engineering, Pennsylvania State University

  • Xixiang Zhang

    KAUST

  • Caihua Wan

    CAS

  • Xiufeng Han

    CAS, Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

  • Kang-Lung Wang

    Department of Electrical and Computer Engineering, University of California, Los Angeles, University of California, Los Angeles