Silicene on Ag(111) : domains and local defects of the observed superstructures
On Ag(111) substrate, the growth of a silicene layer (the equivalent of graphene for silicon) gives rise to four main superstructures due to the epitaxy between the silicene layer (honeycomb structure) and the Ag(111) substrate. Depending on both the substrate temperature and the deposition rate, th...
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| Veröffentlicht in: | Journal of physics. Conference series 2014-03, Vol.491 (1), p.12001-7 |
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| container_title | Journal of physics. Conference series |
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| creator | Jamgotchian, Haik Colignon, Yann Ealet, Bénédicte Parditka, Bence Hoarau, Jean-Yves Girardeaux, Christophe Aufray, Bernard Bibérian, Jean-Paul |
| description | On Ag(111) substrate, the growth of a silicene layer (the equivalent of graphene for silicon) gives rise to four main superstructures due to the epitaxy between the silicene layer (honeycomb structure) and the Ag(111) substrate. Depending on both the substrate temperature and the deposition rate, the following superstructures were observed: (4×4), (× )R13.9°, (2× 2)R30° and (× )R19.1°. Each one corresponds to a specific rotation of the silicene layer with respect to the silver substrate. In this paper we show and discuss for each superstructure all the expected equivalent domains due to the symmetry properties of both the silicene honeycomb structure and the trigonal silver surface. Finally, we show, from STM images of the (2× 2)R30° superstructure, the role played by periodic local defects on the average direction of the superstructures. |
| doi_str_mv | 10.1088/1742-6596/491/1/012001 |
| format | Article |
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| subjects | Condensed Matter Defects Deposition Domains Equivalence Graphene Honeycomb structures Materials Science Physics Silicene Silicon substrates Silver Substrates Superstructures Symmetry Two dimensional materials |
| title | Silicene on Ag(111) : domains and local defects of the observed superstructures |
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