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, Kang L. Wang

Research output: Contribution to journalArticlepeer-review

213 Scopus citations

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.
Original languageEnglish (US)
JournalNature Communications
Volume11
Issue number1
DOIs
StatePublished - Jul 31 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): OSR-2016-CRG5-2977
Acknowledgements: The sample synthesis and characterization efforts are supported by the US Department of Energy under grand DE-SC0019068. The transport measurements in this work are supported by the ARO program under contract W911NF-15-1-10561, National Science
Foundation with Award nos. 1935362 and 1909416, the Spins and Heat in Nanoscale Electronic Systems (SHINES), an Energy Frontier Research Center funded by the US Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) under award #SC0012670. We are also grateful to the support from the National Science Foundation (DMR-1411085) and DOE, Office of Science, BES under Award No. DESC0020221. L-TEM measurements is based on research supported by the King Abdullah University of Science and Technology, Office of Sponsored Research and under the award No. OSR-2016-CRG5-2977.

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