应变石墨烯中电子光学的机理及应用研究

项目名称： 应变石墨烯中电子光学的机理及应用研究

项目编号： No.11204383

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 曹振洲

作者单位： 中南民族大学

项目金额： 25万元

中文摘要： 石墨烯是电子光学领域利用界面控制电子束的首选材料，其电子光学方面的研究有助于设计基于石墨烯的新型电子器件，已得到人们的广泛关注。应变给石墨烯的性质带来许多奇妙的改变，且是石墨烯中普遍存在的现象。但是应变石墨烯中许多电子光学领域的研究尚未开展或深入。本项目拟采用"紧键近似"模型，考虑应变引起的石墨烯倒易空间的Dirac点移动和Dirac锥体变形的效应，结合电子光学领域研究中已发展成熟的理论方法，针对石墨烯中电子传输遇到势垒时的负折射和全反射的物理机制开展研究。进而分析应变对电子（自旋）透镜、波导性质的影响，改进设计方案。最后，拓展应变电子光学理论至双层石墨烯。

中文关键词： 石墨烯；应变；电子输运；电子光学；

英文摘要： Graphene is a preferred material whose interface can be using to control electron beam in the field of electron optics. The investigations of graphene electron optics make for design of the new electron device. Many people have paid close attentions to this. Strain of graphene is ubiquitous and changes the properties of graphene wonderfully. However, many studies of strained graphene in electron optics field are not carried out or done deeply. In this project, the tight-binding approximation which contains strain effect of the Dirac cones' deformation and displacement of the Dirac points in reciprocal space, and the newly developed theories in the field of electron optics are used to explore physical mechanisms of negative refraction and total reflection when electrons are incident upon barriers. And then the strain influences on electron (spin) optics and waveguide are analyzed and the improvements of design are proposed. Finally, the theories of the strain electron optics are expanded to the investigations of bilayer graphene.

英文关键词： graphene；strain；electron transport；electron optics；