Yamamoto Tatsuya, Izumi Ryo, Miki Kazushi, Yamasaki Takahiro, Sugawara Yasuhiro, Li Yan Jun
Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
Department of Electrical Materials and Engineering, University of Hyogo, Shoya 2167, Himeji, Hyogo 671-2280, Japan.
Beilstein J Nanotechnol. 2020 Nov 19;11:1750-1756. doi: 10.3762/bjnano.11.157. eCollection 2020.
The atomic arrangement of the Si(110)-(16×2) reconstruction was directly observed using noncontact atomic force microscopy (NC-AFM) at 78 K. The pentagonal structure, which is the most important building block of the reconstruction, was concluded to consist of five atoms, while only four or five spots (depending on tip bias) have been reported with scanning tunneling microscopy (STM). Single atoms were determined to exist near step edges between upper and lower terraces, which have not been reported using STM. These findings are key evidence for establishing an atomic model of the Si(110)-(16×2) reconstruction, which indeed has a complex structure.
利用非接触原子力显微镜（NC-AFM）在78 K下直接观察了Si(110)-(16×2)重构的原子排列。五角形结构是重构中最重要的结构单元，其由五个原子组成，而扫描隧道显微镜（STM）仅报道了四或五个斑点（取决于针尖偏压）。确定单原子存在于上下平台之间的台阶边缘附近，这是STM未曾报道过的。这些发现是建立Si(110)-(16×2)重构原子模型的关键证据，该重构确实具有复杂的结构。
