Asia Pacific Physics Week 2024 (APPW2024)

Friday, Nov. 8, 2024 

2:00 PM - 2:40 PM  Plenary Talk: Junling Wang (City University of Hong Kong)

Controlling Magnetization (and Spin) with Electric Field

Junling Wang

Department of Physics, City University of Hong Kong (CityU), Hong Kong, China

Multiferroic materials, such as BiFeO3, allow for the electric-field control of magnetization because of their magnetoelectric coupling effect. They have been studied extensively for the rich underlying physics and potential applications in spintronic devices. However, research on conventional multiferroic materials have encountered serious obstacles, e.g., small coupling coefficients of Type-I multiferroics and low temperature/high conductivity of Type-II multiferroics. 

Recent developments on 2D ferroelectric materials open a new paradigm in the field. After a brief review of our previous work on BiFeO3, I will talk about the unique properties of 2D ferroelectric materials and the opportunities they brought in term of electric-field control of electron spin and magnetization. 

References

[1] “Towards two-dimensional van der Waals ferroelectrics”, Chuanshou Wang, Lu You, David Cobden, Junling Wang, Nature Materials 22, 542 (2023).