| 报告题目 | Spin Filtering and Magnetic Proximity with Rare-Earth Magnetic Insulator |
| 报告人 | Prof. Guo-Xing Miao |
| 报告人单位 | University of Waterloo, Canada |
| 报告时间 | 2013-09-24 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室 |
| 主办单位 | 合肥微尺度物质科学国家实验室、国际功能材料量子设计中心 |
| 报告介绍 | 报告摘要：
We explore the two most exciting properties intrinsic to magnetic insulators, namely spin-filter effect and interfacial magnetic proximity effect. The former is based on spin dependent quantum tunneling across the magnetic barrier, where the two spin channels face different tunnel barrier heights and dramatically different tunnel probabilities, enabling the barrier actively filtering spins. The latter results from indirect exchange interactions between the internal localized spins and adjacent conduction electrons, and can readily amount to an effective Zeeman field strength over tens of Tesla on a low dimensional electron system. We use a vertical tunnel device constructed from a rare-earth chalcogenide, EuS, and metallic Al to illustrate the dual functionalities of this magnetic insulator EuS. Careful tuning on the tunnel barrier configuration and interfaces allows us to achieve magnetoresistance and to directly probe the interface induced Zeeman splitting. We further discuss collaborative research opportunities available for students and researchers alike, on proximity coupled 2D electronic systems such as graphene and topological insulators.
报告人简介：
Dr. Miao received his BSc from Shandong University, China, in 1999. He then moved to Brown University, USA, and received his MSc in 2003 and PhD in 2006. After graduation, Dr. Miao joined Francis Bitter Magnet Laboratory at MIT as a postdoctoral associate, and later on promoted to Research Scientist in 2009. In 2011, he moved to University of Waterloo, Canada, joining the Institute for Quantum Computing (IQC) as Research Assistant Professor in 2011, and the Electrical & Computer Engineering department as Assistant Professor in 2012. Dr. Miao's research interests lie in spintronics, using precise electron spin manipulation for information processing. His research effort has strong emphasis on nanodevices established on newly emerging spin platforms, such as topological insulators and synthetic diamonds, where information can be processed coherently on the quantum level, rather than digitally on the classical level. |
