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Título: | Atomic structure of the √3 × √3 phase of silicene on Ag(111) |
Autor: | Cahangirov, Seymur CSIC; Ongun Özçelik, Veli; Xian, Lede; Cho, Suyeon; Asensio, María C. CSIC ORCID; Ciraci, Salim; Rubio, Angel CSIC ORCID | Fecha de publicación: | 2014 | Editor: | American Physical Society | Citación: | Physical Review B 90(3): 035448 (2014) | Resumen: | The growth of the √3 × √3 reconstructed silicene on Ag substrate has been frequently observed in experiments while its atomic structure and formation mechanism is poorly understood. Here, by first-principles calculations, we show that √3 × √3 reconstructed silicene is constituted by dumbbell units of Si atoms arranged in a honeycomb pattern. Our model shows excellent agreement with the experimentally reported lattice constant and STM image. We propose a new mechanism for explaining the spontaneous and consequential formation of √3 × √3 structures from 3×3 structures on Ag substrate. We show that the √3 × √3 reconstruction is mainly determined by the interaction between Si atoms and have weak influence from Ag substrate. The proposed mechanism opens the path to understanding of multilayer silicon | Descripción: | Under the terms of the Creative Commons Attribution License 3.0 (CC-BY). | Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.90.035448 | URI: | http://hdl.handle.net/10261/136886 | DOI: | 10.1103/PhysRevB.90.035448 | Identificadores: | doi: 10.1103/PhysRevB.90.035448 issn: 2469-9950 e-issn: 2469-9969 |
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phase of silicene.pdf | 1,29 MB | Adobe PDF | Visualizar/Abrir |
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