拓扑绝缘体表面态电子输运与自旋极化性质研究

项目名称： 拓扑绝缘体表面态电子输运与自旋极化性质研究

项目编号： No.11274102

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 周斌

作者单位： 湖北大学

项目金额： 78万元

中文摘要： 拓扑绝缘体表面态具有新奇的物理性质，其在自旋电子学和量子计算等领域中有着潜在的应用价值，也是目前凝聚态物理研究领域中倍受关注的热点方向。本项目将关注拓扑绝缘体材料中表面态电子输运及自旋极化的相关理论问题，重点研究弱反局域化行为、反常霍尔效应、光致霍尔电流效应和电流诱导自旋极化效应及其相关的拓扑量子相变性质。利用格林函数方法探讨杂质散射效应对拓扑绝缘体表面态电子输运性质的影响。通过研究探索拓扑绝缘体表面态电子输运行为与拓扑绝缘体所特有的拓扑性质之间的联系，深入了解拓扑绝缘体中电子输运的物理规律与性质，完善利用电学方法调控拓扑绝缘体电子自旋的理论，为新一代拓扑绝缘体器件提供理论设计基础。

中文关键词： 拓扑绝缘体；表面态；自旋轨道耦合；拓扑相变；

英文摘要： The topological insulator surface states have the exotic physical properties, and thus they may have potential applications in spintronics and quantum computation and are also now a hot research topic in the field of condensed matter physics. In this project, we will focus on the theoretic problems relative to electron transport and spin polarization of topological insulator surface states, and study the weak antilocalization, the anomalous Hall effect, the light-induced Hall effect, the current-induced spin polarization effect and the properties of topological quantum phase transitions relative to these effects. We will investigate the effects of impurity scattering on the electron transport properties of topological insulator surface states using the Green function method. We aim to explore the relationship between the electron transport behaviors of topological insulator surface states and the characteristic topological properties of topological insulators, to understand the physical rules and the properties of electron transport in topological insulators, to improve the theory of manipulating electronic spin of topological insulators by using of the electronics methods, and to provide the theoretical design bases of new type topological insulator apparatuses.

英文关键词： topological insulator；surface state；spin-orbit coupling；topological phase transition；