EmergingOpportunities in 2D Ferroic and Multiferroic Materials and Devices
Two-dimensional(2D) layered van der Waals (vdW) ferroics (e.g., ferromagnets [1,2] andferroelectrics [3]) are atomic-thin crystalline flatlands with long-rangeferroic order. Given that these functional materials are optically transparent, mechanically flexible, and electrically tunable, their properties are highlytailorable by external stimuli, leading to numerous new physical phenomena andnovel device functionalities. In this talk, I will discuss our series of workon optical [4], mechanical [5,6], and electrical control of 2D magnets [7-10], with a broad portfolio of condensed matter physics topics studied, includingspin-photon interaction, magnetoelastic effect, and interferroicmagnetoelectric coupling, to name a few. Next, I will explain a unique set ofhigh-performance vdW ferroelectric tunnel junctions we have developed in recentyears. Finally, I will end the talk with a brief introduction to our 2D sensorsfor food safety guarding, early diagnosis of disease, and electromagnetic fielddetection. Hopefully, the audience will be convinced that 2D ferroic andmultiferroic materials and devices constitute largely uncharted territories, with a wide range of exotic quantum material physics and new device conceptsemerging.
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2. C.Gong, X. Zhang. Science 363, eaav4450 (2019).
3. Q.Wang, et al. Matter 5, 4425-4436 (2022).
4. T.Xie, et al. Nature Physics 21, 1118–1124 (2025).
5. T.Xie et al. unpublished.
6. Y.Wang et al. unpublished.
7. C.Gong, et al. Nature Communications 10, 2657 (2019).
8. S.Liang, et al. Nature Electronics 6, 199–205 (2023).
9. S.Liang, et al. Nature Electronics 9, 23–32 (2026).
10. T.Xie, et al. Nature Nanotechnology (DOI: 10.1038/s41565-025-02065-1,2026).
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