自旋轨道耦合对石墨烯基超导异质结输运特性影响的理论研究

项目名称： 自旋轨道耦合对石墨烯基超导异质结输运特性影响的理论研究

项目编号： No.U1204110

项目类型： 联合基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 白春旭

作者单位： 安阳师范学院

项目金额： 30万元

中文摘要： 随着微加工技术和纳米技术的发展，常规微电子器件将逐步达到其经典物理极限，迫切需要人们去研究处于纳米尺度量子器件的电学特性。本项目旨在构建包含自旋轨道耦合效应的石墨烯基超导异质结中准粒子输运模型来研究其中低能激发准粒子的输运特性，掌握自旋轨道耦合效应及其结构参数等对其中低能激发载流子输运特性的调控关系。通过理论研究以期为构造石墨烯基超导量子器件提供科学依据和理论指导。此外，在超导石墨烯材料界面上所特有的 Specular-Andreev 反射与普通材料超导结界面处的 Retro-Andreev 反射有着定性的不同。所以我们预期对包含自旋轨道耦合效应的石墨烯基超导异质结中准粒子输运特性的研究将揭示出一系列新颖、迷人的量子现象。因此本项目的研究不仅具有重要的应用价值，而且具有重要的理论研究意义。?

中文关键词： 镜面Andreev 反射；石墨烯；自旋轨道耦合；Andreev 束缚态；

英文摘要： With the development of the micro processing technology and nanotechnology, conventional microelectronic devices would eventually reach the limits of the physical law. To get rid of this dilemma, the demand in the research of electrical attributes of nanoscale quantum devices has been steadily becoming urgently. In the project, the transport characteriscs of low energy quasiparticles under the influence of spin-orbit interaction and structure parameters through graphene-superconducting heterojunction are considered on the base of the transport model which includes the spin-orbit interaction. Meanwhile, to provide an important reference to the design of graphene-superconducting electron devices based on graphene materials, the route to modulate the transport properties of graphene-superconducting heterojunction will be investigated. Furthermore, since a graphene-superconducting structure can exhibit specular Andreev reflection in contrast to the usual retro Andreev reflection observed in conventional materials, it is expected that a series of novel and intriguing quantum phenomena will be revealed. Overall this project not only has an important application value, it also possesses a significant theoretical research significance.

英文关键词： specular Andreev reflection；graphene；spin orbital interaction；Andreev bound state；