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Transporteigenschaften von Graphen

石墨烯的传输特性

基本信息

批准号：
64202200
负责人：
Professor Dr. Klaus Ziegler
金额：
--
依托单位：
Institut für Physik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2008
资助国家：
德国
起止时间：
2007-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/64202200?language=en
关键词：
Transporteigenschaften von Graphen

项目摘要

In this project we propose to study transport properties of two-dimensional electronic systems with two bands and particle-hole symmetry. A prominent example of this class of physical systems is graphene, others are surface states of topological insulators. In the first part we propose to study electronic and optical properties near Dirac nodes, the influence of internode scattering and the effect of additional nodes, created by periodic potentials. In a second part the transport properties away from the Dirac nodes should be investigated, in particular, near the saddle points of the node structure. And finally, a third part of this proposal deals with the transport near structural instabilities in graphene, which are caused by electron-phonon interaction. This work will be based on analytic field-theoretical methods and numerical transfer-matrix calculations. Both approaches have been developed and tested in the first period of this project and have the potential for more general applications. The proposal is related to the results we have obtained during the first period of the project on "Transporteigenschaften von Graphen" and presents a systematic extension of our previous research. The goal is to provide an insight into the fundamental properties of a new class of materials that have a large potential for electronic and optical applications.

在本计画中，我们打算研究具有双能带和粒子-空穴对称性的二维电子系统的输运性质。这类物理系统的一个突出例子是石墨烯，其他是拓扑绝缘体的表面态。在第一部分中，我们建议研究狄拉克节点附近的电子和光学性质，节点间散射的影响和附加节点的效果，由周期性的潜力。在第二部分中，远离狄拉克节点的输运性质应进行调查，特别是在鞍点附近的节点结构。最后，该提案的第三部分涉及石墨烯中结构不稳定性附近的输运，这是由电子-声子相互作用引起的。这项工作将基于分析场理论方法和数值传输矩阵计算。这两种方法都已在本项目的第一阶段得到开发和测试，并有可能得到更广泛的应用。该提案与我们在“Transporteigenschaften von Graphen”项目的第一阶段获得的结果有关，并提出了我们以前研究的系统扩展。我们的目标是提供对一类新材料的基本性质的洞察，这些材料在电子和光学应用方面具有很大的潜力。