新型二维晶体材料黑磷的自旋输运行为研究

黑磷是最近在实验上新发现的二维晶体材料。黑磷以其高载流子迁移率的特点，以及可调控的直接带隙结构，使它从其他二维材料中脱颖而出，成为目前研究的热点。最近实验证明用黑磷制作的场效应晶体管具有十分优越性能，许多基于黑磷的半导体原型器件已被成功演示。目前，虽然我们对黑磷的电荷输运行为已有较多的理解，但是其自旋输运行为还处于未知状态。为此，本项目希望探索黑磷的自旋输运特性。项目将采用非局域测量方式探索黑磷的自旋输运行为，通过系统研究自旋信号对温度、背栅电压、薄膜厚度以及原子晶向的依赖关系，理解黑磷中自旋输运行为，为开发基于黑磷的自旋电子学器件打下基础。

Black phosphorus (BP) is a recently added number of two dimensional (2D) crystal family. Due to its high carrier mobility, tunable direct bandgap, BP has distinguished itself from graphene and other 2D materials. FETs made out of BP have recently been shown to exhibit superior semiconductor device performances. So far, various charge based devices are demonstrated and the charge transport properties of BP are intensively studied, however, its spin transport characteristics are totally unexplored. So in the proposed project, we hope to study the spin transport characteristics of BP. By using nonlocal measurement technique, we will study the dependence of nonlocal signal on temperature, gate voltage, film thickness, and BP atomic axis. The underlying physics nature of spin transport in BP will be explored. The results of proposed project will helpful to understand spin transport properties of BP and benefit for the development of BP based spintronic devices.