Atomic and electronic structures of the (13×13)R13.9° of silicene sheet on Ag(1 1 1)
| Autor: | Hamid Oughaddou, Mustapha Ait Ali, Abdelkader Kara, Gérald Dujardin, Hanna Enriquez, Handan Yildirim, Mohamed Rachid Tchalala, Andrew J. Mayne |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Low-energy electron diffraction
Condensed matter physics Chemistry Silicene Fermi level General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry Electronic structure 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surfaces Coatings and Films law.invention symbols.namesake law 0103 physical sciences symbols Density functional theory van der Waals force Scanning tunneling microscope 010306 general physics 0210 nano-technology Superstructure (condensed matter) |
| Zdroj: | Applied Surface Science. 303:61-66 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2014.02.064 |
| Popis: | Using scanning tunneling microscopy, low energy electron diffraction measurements, and ab initio calculations based on density functional theory, we present atomic models of the ( 13 × 13 )R13.9° silicene superstructure grown on Ag(1 1 1). The STM images reveal two co-existing atomic arrangements with two different orientations of the silicene sheet relative to the Ag(1 1 1) surface. DFT calculations with and without the inclusion of van der Waals interactions show corrugated Si atomic positions for both orientations implying a significant interaction with Ag(1 1 1) surface. The electronic structure of both silicene and Ag(1 1 1) surface are sufficiently affected that new interface states emerge close to the Fermi level. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect