Yingying Wu

Topological Hall effect has been observed under 100 K. Néel-type skyrmion lattice and the stripe-like magnetic domain structures are induced at the interface. The skyrmion size is estimated to be 150 nm at 94 K and 80 nm at 198 K. This interfacial coupling induced Dzyaloshinskii-Moriya interaction (DMI) is calculated from the domain width and has a large energy of 1.0 mJm^-2.

For more information, please refer to our paper: Wu, Yingying, et al. “Néel-type skyrmion in WTe₂/Fe₃GeTe₂ van der Waals heterostructure.” Nature Communications 11, 3860(2020) Read More

Observed skyrmion lattice observed from the WTe₂/Fe₃GeTe₂ interface. Micro-simulation indicates a finite penetration of the interfacial DMI.

This is the first and direct observation of skyrmions in vdW heterostructures, which can help promote 2D materials for ultra-compact spintronic devices.

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