Ag（111）表面合成银二聚体过程中的空占共振演化
Evolution of unoccupied resonance during the synthesis of a silver dimer on Ag(111)
摘要：
利用低温扫描隧道显微镜的针尖，通过单原子操作在Ag（111）表面制备了银二聚体。一个未占用的电子共振被观察到向费米能级与原子-原子的距离减少监测的空间分辨扫描隧道光谱。密度泛函计算被用来分析实验观察，并揭示了吸附原子之间的耦合主要是直接的，而不是间接通过Ag（111）衬底。
英文摘要：
Silver dimers were fabricated on Ag(111) by single-atom manipulation using the tip of a cryogenic scanning tunnelling microscope. An unoccupied electronic resonance was observed to shift toward the Fermi level with decreasing atom-atom distance as monitored by spatially resolved scanning tunnelling spectroscopy. Density functional calculations were used to analyse the experimental observations and revealed that the coupling between the adsorbed atoms is predominantly direct rather than indirect via the Ag(111) substrate.
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