Au-二氰基蒽配位结构在Au（111）表面的组装
On-surface Assembly of Au-Dicyanoanthracene Coordination Structures on Au(111)
摘要：
表面金属-有机配位为合成具有奇异电子性质的二维晶格结构提供了一种很有前途的方法。利用扫描隧道显微镜（STM）和光谱学（STS）研究了9，10-二氰基蒽（DCA）分子在Au（111）表面的超分子自组装。在Au（111）表面上存在着DCA分子的密堆积岛和Au-DCA金属有机配位结构。有序DCA $_{3}$ Au $_{2}$金属有机网络具有结合Au原子的蜂窝晶格与DCA分子的kagome晶格的结构。低温STS实验表明，存在一个离域的电子态，包含来自金原子态和DCA分子的最低未占分子轨道的贡献。这些发现对于今后在蜂窝和kagome晶格结合的重金属原子中具有强自旋轨道耦合的金属-有机网络中寻找拓扑相具有重要意义。
英文摘要：
On-surface metal-organic coordination provides a promising way for synthesizing different two-dimensional lattice structures that have been predicted to possess exotic electronic properties. Using scanning tunneling microscopy (STM) and spectroscopy (STS), we studied the supramolecular self-assembly of 9,10-dicyanoanthracene (DCA) molecules on the Au(111) surface. Close-packed islands of DCA molecules and Au-DCA metal-organic coordination structures coexist on the Au(111) surface. Ordered DCA$_{3}$Au$_{2}$ metal-organic networks have a structure combining a honeycomb lattice of Au atoms with a kagome lattice of DCA molecules. Low-temperature STS experiments demonstrate the presence of a delocalized electronic state containing contributions from both the gold atom states and the lowest unoccupied molecular orbital of the DCA molecules. These findings are important for the future search of topological phases in metal-organic networks combining honeycomb and kagome lattices with strong spin-orbit coupling in heavy metal atoms.
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