论文标题
对人工石墨烯纳米叶片中边缘状态的调查
Investigation of Edge States in Artificial Graphene Nano-Flakes
论文作者
论文摘要
石墨烯纳米叶片（GNF）被预测为宿主自旋偏振金属边缘状态，该状态被设想用于以纳米尺度探索旋转的旋转状态。迄今为止，GNFS的实验实现仅在起步阶段，因为在纳米尺度上精确切割或合成方法的限制。在这里，我们使用低温扫描隧道显微镜（STM）来操纵Cu（111）表面上的冠状分子，以构建具有锯齿形或扶手椅边缘类型的人工三角形和六角形GNF。我们观察到，金属边缘状态仅存在于具有锯齿形边缘的GNF中，并且位于最外部的Sublattice外部。实验结果与紧密结合计算很好。据我们所知，我们的工作是对GNFS谓词电子特性的第一个系统实验确认。
Graphene nano-flakes (GNFs) are predicted to host spin-polarized metallic edge states, which are envisioned for exploration of spintronics at the nanometer scale. To date, experimental realization of GNFs is only in its infancy because of the limitation of precise cutting or synthesizing methods at the nanometer scale. Here, we use low temperature scanning tunneling microscope (STM) to manipulate coronene molecules on a Cu(111) surface to build artificial triangular and hexagonal GNFs with either zigzag or armchair type of edges. We observe that the metallic edge states only exist in the GNFs with zigzag edge and localize at the most outside one type of the sublattice. The experimental results agree well with the tight-binding calculations. To our knowledge, our work renders the first systematic experimental confirmation of the predicated electronic properties of the GNFs.
