Ferroelectric Control of Spintronic Properties in Van der Waals heterostructures

报告题目：Ferroelectric Control of Spintronic Properties in Van der Waals heterostructures

报告人：邵定夫 研究员（中国科学院固体物理研究所）

报告时间：2022年5月12日 19:30-21:30

腾讯会议：563-081-646

摘要：Spintronics utilizes the spin degree of freedom in condensed matter for information processing and storage. The generation of different memory or logic states in spintronic devices usually related to the reversal of the spontaneous magnetization. “Standard” methods to reverse magnetization, such as a magnetic field or a spin torque generated by substantial electric currents, suffer from large energy dissipation. Electric control of magnetization by voltage has significant advantages for low-power spintronics. This requires strong magnetoelectric coupling, which is usually very weak in metallic systems. In this talk, I will discuss two proposals of electric field control of the spintronic properties without reversing the magnetization. We found that in Van der Waals heterostructures composed of two-dimensional magnetic metals and ferroelectric insulators, the spintronic properties, such as anomalous Hall effect and magnetic skyrmions, can emerge due to the reduced symmetry at the interfaces. In addition, the symmetry and the resulted properties in the heterostructures can be further controlled by ferroelectric switching, in spite of the weak magnetoelectric coupling. Our proposal provides an alternative direction for voltage-controlled spintronics and offers as-yet unexplored possibilities for functional devices by heterostructure design.
References:
[1] Ding-Fu Shao, Jun Ding, Gautam Gurung, Shu-Hui Zhang, and Evgeny Y. Tsymbal, Interfacial Crystal Hall Effect Reversible by Ferroelectric Polarization, Phys. Rev. Appl. 15, 024057 (2021).
[2] Kai Huang, Ding-Fu Shao, and Evgeny Y. Tsymbal, Ferroelectric Control of Magnetic Skyrmions in Two-Dimensional van der Waals Heterostructures, Nano Lett. 22, 3349 (2022).

简介：邵定夫，研究员，博士生导师。2008年本科毕业于中国矿业大学，2013年博士毕业于中国科学院固体物理研究所，获中国科学院大学博士学位。2013年至2016年在中国科学院固体物理研究所担任助理研究员。2016年至2021年在美国内布拉斯加大学林肯分校访问研究，任博士后研究员、高级研究员。2021年12月全职回国，加入中国科学院合肥物质科学研究院固体物理研究所。邵定夫研究员长期从事量子材料与器件的理论研究，近期研究兴趣包括反铁磁电子学、二维铁电材料的自旋-轨道电子学等。目前发表学术论文60余篇，其中以第一作者或通讯作者身份在Physical Review Letters、Nature Communications、Science Advances 等期刊发表论文30余篇。