本科研项目将深入研究磁性与拓扑绝缘体之间的相互作用。我们将在绝缘铁磁体/拓扑绝缘体异质结上研究磁性邻近效应，以揭示铁磁薄膜的磁性对拓扑绝缘体物理性质的影响。我们也将在金属铁磁体/拓扑绝缘体异质结上研究一种崭新的物理现象：Spin Orbit Torque，以利用拓扑绝缘体特殊的物理性质来调控邻近铁磁薄膜的磁矩。通过系统研究以上物理现象对温度、磁场、栅压、膜厚等的依赖关系，力图通过磁性邻近效应这一新的方法来实现高温量子反常霍尔效应，并揭示形成Spin Orbit Torque的具体物理机制。本科研项目的顺利执行将使人们对磁性与拓扑绝缘体之间的相互作用有更深入的认识与理解，也为未来拓扑绝缘体在低功耗自旋电子器件的应用打下基础。

The interplay between magnetism and topological insulators (TI) will be investigated in this project. We will study the magnetic proximity effect in insulating ferromagnet/topological insulator heterostructure in order to reveal the influence of magnetism on the physical properties of TIs. We will also study the spin orbit torque in metallic ferromagnet/topological insulator heterostructure, so we can use the unique properties of TI to manipulate the magnetization of ferromagnet. By systematically investigating the dependence of these two phenomena on the temperature, magnetic field, gate voltage, and film thickness, we aim to realize the high-temperature quantum anomalous Hall effect and clarify the physical mechanism for the spin orbit torque of TI. The successful fulfillment of this project will not only deepen our understanding of the interplay between magnetism and topological insulator, but also pave the way for future application of TIs in potential low-power spintronics devices.