期刊
APPLIED SURFACE SCIENCE
卷 517, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.146224
关键词
Stanene; Epitaxial growth; Au(111); STM
类别
资金
- Nagoya University Synchrotron Radiation Research Center
- Murata Science Foundation
- Nagoya University
- Japan Society for the Promotion of Science (JSPS) in 2017
- JSPS KAKENHI [19H04541]
- Grants-in-Aid for Scientific Research [19H04541] Funding Source: KAKEN
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 stanenelike sheet forms a nearly planar structure on the Au(111) surface with a 2x root 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.
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