报告题目：磁性绝缘体与拓扑绝缘体异质结体系中磁性斯格明子的实验研究

报告人：丁进军（美国科罗拉多州立大学）

报告时间：9月26日（周四）下午15:30-16:30

报告地点：北洋园校区32教256

报告摘要：

Magnetic skyrmion, a spin swirling texture, has received remarkable attractions in magnetic society, because of its great potential in future magnetic memory. Topological Hall effect (THE) is believed to be a hallmark of skyrmion, characterizing its unique and nontrivial topological properties.

In experimental practice, topological insulator (TI) is a good candidate in providing large SOC, which is believed to be indispensable in forming skyrmion. Here we show the experimental observation of THE in a magnetic insulator/topological insulator heterostructure for the first time. This THE observation indicates the existence of chiral magnetic structures such as skyrmions in such heterostructure. In addition, manipulation of THE via electric current is also realized, suggesting its potential use in industrial spintronics devices. Moreover, THE is observed in a magnetic-insulator/heavy metal heterostructure, where THE is the strongest when anomalous hall effect (AHE) is weakest.

报告人简介：丁进军分别于2012年，2015年在华中科技大学电子工程系获得学士和硕士学位，现在美国科罗拉多州立大学师从吴明忠(Mingzhong Wu)教授和Carl Patton教授攻读博士学位，预计于2020年1月获得博士学位。他的研究方向为磁性薄膜实验物理，主要包括磁性薄膜/拓扑绝缘体双层膜体系的物性研究，磁学克尔效应设备的开发，极低耗散的钇铁石榴石薄膜的生长等。他现在为多个知名磁学杂志的审稿人。

代表作：

[1] J. Ding, C. Liu, Y. Zhang, O. Mosendz, B. Terris, et al., Nature Materials, in process (2019).

[2] C. Liu*, J. Zhang*, S. Wu*, J. Chen*, J. Ding*, et al., Nature Nanotechnology 14, 691-697 (2019).

[3] T. Liu, J. Kally, H. Chang, J. Ding, T. Pillsbury, et al., Nature Physics, under review (2019).

[4] J. Ding*, P. Li*, T. Pillsbury, U. Erugu, G. Rimal, et al., Nature Physics, in process (2019).