Sequence of Silicon Monolayer Structures Grown on a Ru Surface: from a Herringbone Structure to Silicene
| Autor: | Jinbo Pan, En Li, Wenyan Xu, Yeliang Wang, Yan-Fang Zhang, Yunqi Liu, Shixuan Du, Hong-Jun Gao, Yande Que, Li Huang, Yu-Yang Zhang, Sokrates T. Pantelides |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Silicon Superlattice chemistry.chemical_element Bioengineering Nanotechnology 02 engineering and technology 01 natural sciences law.invention law 0103 physical sciences Monolayer General Materials Science 010306 general physics Silicene Graphene business.industry Mechanical Engineering Transistor General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics chemistry Structural stability Optoelectronics Scanning tunneling microscope 0210 nano-technology business |
| Zdroj: | Nano Letters. 17:1161-1166 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | Silicon-based two-dimensional (2D) materials are uniquely suited for integration in Si-based electronics. Silicene, an analogue of graphene, was recently fabricated on several substrates and was used to make a field-effect transistor. Here, we report that when Ru(0001) is used as a substrate, a range of distinct monolayer silicon structures forms, evolving toward silicene with increasing Si coverage. Low Si coverage produces a herringbone structure, a hitherto undiscovered 2D phase of silicon. With increasing Si coverage, herringbone elbows evolve into silicene-like honeycomb stripes under tension, resulting in a herringbone-honeycomb 2D superlattice. At even higher coverage, the honeycomb stripes widen and merge coherently to form silicene in registry with the substrate. Scanning tunneling microscopy (STM) was used to image the structures. The structural stability and electronic properties of the Si 2D structures, the interaction between the Si 2D structures and the Ru substrate, and the evolution of the... |
| Databáze: | OpenAIRE |
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