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Epitaxial growth of honeycomb-like stanene on Au(111)
Applied Surface Science ( IF 6.7 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.apsusc.2020.146224
Wenhui Pang , Kazuki Nishino , Tsuyoshi Ogikubo , Masaaki Araidai , Masashi Nakatake , Guy Le Lay , Junji Yuhara

Abstract Stanene, which is predicted to be a quantum spin Hall topological insulator with tunable topological state, seems to be the most promising candidate of the post-graphene elemental two-dimensional (2D) materials. Here, we prepared epitaxial honeycomb-like stanene on gold (111) substrates and investigated its superstructure by Low Energy Electron Diffraction and Scanning Tunneling Microscopy. Angle-Resolved PhotoEmission Spectroscopy was applied to explore the electronic structures, further confirmed by first principles calculations. The stanene-like sheet forms a nearly planar structure on the Au(111) surface with a “2×√3” superstructure in large surface areas. Core-level spectroscopy reveals that the stanene-like sheet lays almost directly on the Au(111) surface. This is consistent with DFT calculations of the atomic structure. A characteristic 2D band with parabolic dispersion is observed.

中文翻译:

蜂窝状锡烯在 Au(111) 上的外延生长

摘要 Stanene 被预测为具有可调拓扑状态的量子自旋霍尔拓扑绝缘体,似乎是后石墨烯元素二维 (2D) 材料中最有前途的候选材料。在这里,我们在金 (111) 衬底上制备了外延蜂窝状锡烯,并通过低能电子衍射和扫描隧道显微镜研究了其超结构。应用角度分辨光发射光谱来探索电子结构,并通过第一性原理计算进一步证实。类stanene片在Au(111)表面形成近乎平面的结构,大表面积具有“2×√3”超结构。核心级光谱显示类锡烯片几乎直接位于 Au(111) 表面。这与原子结构的 DFT 计算一致。
更新日期:2020-07-01
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