Two-Dimensional Ferroic Materials and Devices

Speaker: Dr. Cheng Gong, University of Maryland Abstract: The emergent ferroic (both ferromagnetic and ferroelectric) two-dimensional (2D) van der Waals (vdW) materials [1, 2] provide ideal platforms to enable the atomically thin, flexible, lightweight magneto-optical and magnetoelectric devices. Recent years have witnessed the new developments of such two-dimensional ferroic devices, but for many cases they remain in the proof-of-concept stage without superior performance demonstrated yet. In this talk, I will present our recent progress on multiple facets of fundamental physics of 2D ferroics and the exciting device developments based on these 2D ferroics [3-7] such as the vdW ferroelectric tunnel junctions with record-high electroresistance [6] and small-voltage, non-volatile control of 2D ferromagnets [7]. The understanding and control of 2D ferroics and the advancement of 2D ferroic devices we have developed potentially pave new avenues to the energy-efficient nanoelectronic devices. 1. C. Gong et al. Nature 546, 265-269 (2017). 2. C. Gong, X. Zhang. Science 363, eaav4450 (2019). 3. C. Gong, et al. Nature Communications 10, 2657 (2019). 4. S.-J. Gong, et al. PNAS 115, 8511-8516 (2018). 5. E.-W. Du, et al. Nano Letters 20, 7230-7236 (2020). 6. Q. Wang, et al. Matter 5, 4425-4436 (2022). 7. S. Liang, et al. Nature Electronics 6, 199-205 (2023).