Graphene nano-flakes weakly coupled to the substrate: atomic structure, electronic states and manipulation

石墨烯纳米片与基底弱耦合：原子结构、电子态和操纵

• 批准号: 240827410
• 负责人: Professor Dr. Mikhail Fonin
• 金额: --
• 依托单位: Arbeitsgruppe Magnetische Materialien und Spintronik
• 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: https://gepris.dfg.de/gepris/projekt/240827410?language=en
• 关键词: Graphene; nano; flakes; weakly; coupled

The goal of the present project is the investigation of novel effects that occur due to the confined electronic states as well as the due to the edge states in graphene nano-flakes which are very weakly coupled to substartes in bulk and at the edges. The physics of such graphene objects is largerly unexplored with a range of theories and novel predictions existing about the local electronic and magnetic properties that are untested so far. In the frame of this project a combination of scanning tunneling microscopy and spectroscopy together with the density functional theory calculations will be used to get a better insight into the electronic states, the electron dynamics and magnetic properties of quasi-free-standing graphene nano-flakes. Additionally, lateral maniplulation of graphene flakes by the STM tip will be utilized aiming at the preparation of atomically precise graphene multilayer structures, which local electronic structure will be studied by experimental and theoretical methods.

本项目的目标是调查由于受限电子态以及由于石墨烯纳米片中的边缘态而发生的新效应，石墨烯纳米片与散装和边缘的子星耦合非常弱。这种石墨烯物体的物理学尚未被探索，目前存在一系列关于局部电子和磁性的理论和新预测，这些理论和预测迄今为止尚未得到验证。在该项目的框架内，扫描隧道显微镜和光谱学与密度泛函理论计算相结合，将用于更好地了解准独立石墨烯纳米片的电子态，电子动力学和磁性。此外，横向manipululation的石墨烯薄片的STM尖端将被利用，旨在制备原子级精确的石墨烯多层结构，其局部电子结构将通过实验和理论方法进行研究。