[Physics-grads-open] Special Seminar: Efficient Control of 2D Magnets | Thursday August 17, 2023 3:00PM

[Jennifer E Reising]

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Dr. Cheng Gong
Department of Electrical and Computer Engineering and Quantum Technology Center,
University of Maryland, College Park


Efficient Control of 2D Magnets


Abstract:  The emergent two-dimensional (2D) layered magnets [1,2] provide ideal platforms to enable the atomically thin magneto-optical and magnetoelectric devices. Though many have envisioned that 2D magnets should allow efficient control of magnetism by a variety of external stimuli, true breakthroughs are still lacking, with limited proof-of-concept demonstrations reported thus far. There appear to be fundamental obstacles for efficient control, e.g., through electrical and optical means. In this talk I will analyze the challenges and present our theoretical and experimental progress on efficient electrical [3-7] and optical control [8,9] of 2D magnets. Specifically, the results show that the voltage of a few volts can effectively change the magnetic anisotropy of 2D magnets and the laser shinning of tens of uW/um2 can effectively affect the domain behaviors of 2D magnets. These efficient controls of 2D magnets potentially open up new avenues towards low-power spintronics and photonics.

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 (2018).

5.      E.-W. Du, et al. Nano Letters 20, 7230 (2020).

6.      S. Liang, et al. Nature Electronics 6, 199-205 (2023).

7.      Q. Wang, et al. Matter 5, 4425-4436 (2022).

8.      Y. Gong, et al. npj 2D Materials and Applications 6, 9 (2022).

9.      T. Xie, et al. under review (2023).
Bio: Prof. Cheng Gong has been an assistant professor in the Department of Electrical & Computer Engineering at University of Maryland, College Park since 2019. His research group focuses on 2D quantum materials and devices. He is a recipient of IUPAP Young Scientist Prize in Semiconductor Physics 2020. In 2022, Prof. Gong won UMD's "Invention of the Year" and ACS Maryland "Chemist of the Year". From 2014 to 2019, he was a postdoctoral fellow at UC Berkeley, where he pioneered the experimental discovery of the first 2D magnet.







Thursday, August 17, 2023

3:00 p.m. in the Physics & Astronomy Reading Room (3035)


Kind regards,

Jennifer Reising
Financial Services Supervisor
UC Riverside | Physics & Astronomy
3047 Physics Building | Riverside, California 92521
Office: 951.827.5033 | jreising at ucr.edu<mailto:jreising at ucr.edu>
In-person office hours:  Monday, Wednesday & Thursday from 8:00 am - 5:00 pm
Virtual office hours:  Tuesday & Friday from 8:00 am - 5:00 pm
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