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Efficient Control of 2D Magnetism

January 31, 2022 - 11:00am
Cheng Gong
Department of Electrical and Computer Engineering and Quantum Technology Center, University of Maryland, College Park

Abstract: Emergent two-dimensional (2D) atomic crystals [1,2] hold great promise for efficient control of magnetism, fundamentally owing to the 2D nature. However, thus far, there have been only proof-of-concept reports on electrical and optical control of 2D magnetism, and there appear to be some fundamental obstacles for the efficient control. In this talk, I will analyze the challenges and present our recent theoretical and experimental progress on efficient electrical and optical control of 2D magnetism [3-5]. Specifically, our results show that the continuous wave laser of 10s of uW/um2 can effectively change the domain behaviors in 2D magnets, and 100 mV/nm electric field can effectively change the magnetic anisotropy of 2D magnets. We envision the efficient control of 2D magnets could open new avenues for the low-power spintronics and photnics.

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).

JQI Seminars are held on Mondays during Fall and Spring semesters at 11:00 a.m. Eastern Time in Room 2400 of the Atlantic Building. University of Maryland affiliates may participate using Zoom. The seminars are also livestreamed on the JQI YouTube channel (, which supports audience participation in the chat interface.

ATL 2400