Spin-Charge Locked Magneto-Transport and Mesoscopic Interference Phenomenain Topological Insulators
自旋电荷锁定磁输运和拓扑绝缘体介观干涉现象
基本信息
- 批准号:237551910
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Priority Programmes
- 财政年份:2013
- 资助国家:德国
- 起止时间:2012-12-31 至 2016-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Genuine mesoscopic interference effects acquire increased complexity in topological insulators, where coherent electronic conduction is based on topologically non-trivial helical surface states wrapping around a nominally insulating bulk. We plan to systematically investigate various aspects and phenomena of magneto-transport through ballistic and disordered topological insulators at mesoscopic scales with particular focus on the interplay between quantum coherence and topology. To this end will consider the following inter-related objectives: (i) Extending our promising studies from the first funding period we will address the limits and robustness of quantum spin Hall edge conductance in 2D structures with emphasis on the role of charge puddles due to long-range potential fluctuations. (ii) We will consider quantum interference effects, in particular Aharonov-Bohm-type features, in the magneto-conductance of 3D topological insulator nanowires and structures built from them. (iii) We will investigate the coupled charge and spin dynamics on the surface of 3D topological insulator nanostructures, with emphasis on non-local effects in multi-terminal configurations and the role of gating. In particular, we will explore, in view of spin-momentum locking, the consequences of spin injection/extraction via ferromagnetic contacts.On the one hand we will employ analytical techniques from the theory of mesoscopic conductors and on the other hand efficient numerical tight-binding transport codes for realistic models of HgTe-based topological insulators by taking into account disorder, spin-orbit interaction and electrostatic gating effects. We will perform our investigations in close cooperation with corresponding experiments on quantum transport in 2D and 3D topological insulators.
真正的介观干涉效应在拓扑绝缘体中获得增加的复杂性,其中相干电子传导基于缠绕在名义上绝缘体周围的拓扑非平凡螺旋表面状态。我们计划在介观尺度上系统地研究通过弹道和无序拓扑绝缘体的磁输运的各个方面和现象,特别关注量子相干性和拓扑结构之间的相互作用。为此,将考虑以下相互关联的目标:(i)从第一个资助期开始,我们将扩展我们有前途的研究,我们将解决量子自旋霍尔边缘电导在2D结构中的限制和鲁棒性,重点是由于长距离电位波动引起的电荷池的作用。(ii)我们将考虑量子干涉效应,特别是Aharonov-Bohm型的功能,在三维拓扑绝缘体纳米线的磁导和结构,从他们建立。(iii)我们将研究三维拓扑绝缘体纳米结构表面上的耦合电荷和自旋动力学,重点是多终端配置中的非局部效应和门控的作用。特别是,我们将探讨,鉴于自旋动量锁定,自旋注入/提取通过铁磁contacts. In一方面,我们将采用从介观导体理论的分析技术,另一方面,有效的数值紧束缚传输代码的现实模型的碲基拓扑绝缘体考虑到无序,自旋轨道相互作用和静电门效应的后果。我们将与相应的2D和3D拓扑绝缘体量子输运实验密切合作进行研究。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Professor Dr. Klaus Richter其他文献
Professor Dr. Klaus Richter的其他文献
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{{ truncateString('Professor Dr. Klaus Richter', 18)}}的其他基金
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