GRK 1570: Electronic Properties of Carbon-based Nanostructures

研究培训小组的目标是对基于碳的纳米结构(CBN)的电子性质进行实验和理论研究，即基于石墨烯、碳纳米管、芳香族分子或它们的杂化的器件。我们将重点关注：(1)最近发现的单层、多层和纳米石墨烯的电学性质，也受到机械和振动自由度的影响；(2)基于碳纳米管的量子线的未知特性，在这种量子线中，管被悬浮起来，用于生物传感器应用，或者被用作纳米头在芳香分子之间传输；(3)在分子的扫描隧道光谱和单分子单电子晶体管中的振动和开关效应。在实验上，我们的目标是用各种辅助工具来表征、控制和操纵CBN，包括二端和三端组态和霍尔几何结构的非平衡输运实验、时间分辨拉曼光谱、扫描隧道光谱和原子力成像。从理论上讲，我们将进行全量子力学和半经典输运计算，目的是定性和定量地了解实验研究的CBN的性质。设想了理论小组和实验小组之间的密切合作。研究训练组将建立和补充物理系在纳米科学领域的现有科学据点，范围从自旋电子学到量子信息和分子电子学。与化学系的合作将加强分子电子学领域的现有活动，提供机会将自上而下和自下而上的方法结合起来。研究培训小组的教学、研讨会和讲习班方案将反映研究方案的跨学科性质，涉及理论和实验凝聚态物理以及有机化学和分析化学的小组。研究培训小组的所有学生都可以参加专题讲座和研讨会，这些讲座和研讨会将提供共同的语言和知识，并使博士生有机会接受多方面的科学教育，这在博士学习期间通常是无法获得的。

Aim of the Research Training Group is the experimental and theoretical investigation of electronic properties of carbon-based nanostructures (CBNs), i.e., devices based on graphene, carbon nanotubes, aromatic molecules or hybrids of those. We shall focus on: (1) the electrical properties, also as influenced by mechanical and vibrational degrees of freedom, of the recently discovered single-layer, multi-layer and nanopatterned graphene; (2) unexplored features of carbon nanotubes-based quantum wires, in which the tubes are suspended, functionalised for biosensor applications or utilised as nanoleads for transport across aromatic molecules; (3) vibronic and switching effects in scanning-tunnelling spectroscopy of molecules and in single-molecule single-electron transistors. Experimentally, we aim at the characterisation, control and manipulation of CBNs with various complementary tools, comprising non-equilibrium transport experiments in two- and three-terminal configurations and in Hall geometry; time-resolved Raman spectroscopy; scanning tunnelling spectroscopy and atomic force imaging. From the theoretical point of view, we shall perform fully quantum mechanical and semiclassical transport calculations aiming at a qualitative and quantitative understanding of the properties of the experimentally investigated CBNs. A close collaboration between theoretical and experimental groups is envisaged. The Research Training Group will be built on and complement the existing scientific strongholds of the physics department in the field of nanoscience, ranging from spin-electronics to quantum information and molecular electronics. The collaboration with the chemistry department will strengthen the existing activities in the field of molecular electronics, offering the opportunity to combine top-down and bottom-up approaches. The interdisciplinary character of the research programme, involving groups from theoretical and experimental condensed matter physics as well as from organic and analytical chemistry, will be reflected in the teaching, seminar and workshop programme of the Research Training Group. Thematic lectures and seminars, accessible to all students of the Research Training Group, will provide a common language and knowledge and give the doctoral students the opportunity of a multifaceted scientific education, usually not available during PhD studies.