Berlin 2015 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 63: 2D Materials beyond Graphene
O 63.2: Poster
Mittwoch, 18. März 2015, 18:15–21:00, Poster A
Unoccupied electronic states in silicene nanoribbons on Ag(110) — •Luca Bignardi1, Fabian Kleimeier1, Mohammed Rachid Tchalala2, Hamid Oughaddou2,3, and Helmut Zacharias1 — 1Physikalisches Institut, Westfälische Wilhems-Universität, Wilhlem-Klemm-Str. 10, 48149 Münster, Germany — 2Institut des Sciences Moléculaires d'Orsay, ISMO-CNRS, Bâtiment 210, Université Paris-Sud, 91405 Orsay, France. — 3Département de Physique, Université de Cergy-Pontoise, 95000 Cergy-Pontoise, France
In the last few years, silicene, a honeycomb 2D lattice of Si atoms, has emerged as a potential candidate for new-generation electronic devices, with the advantage of being compatible with existing semiconductor technologies. A full technological exploitation of this material requires a comprehensive characterisation of its occupied and unoccupied electronic structure.
Deposition of silicon on Ag(110) single-crystals is known to result in the formation of self-assembled silicene nanoribbons, showing a (2x5) overlayer. In this contribution, we present an investigation of the unoccupied electronic states of this interface. By means of inverse photoemission spectroscopy (IPE), we identify the electronic empty states due to the silicene nanoribbons. Moreover, we provide a description of the modifications induced by the Si overlayer on the unoccupied states of the metallic substrate.