Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 94: 2D Materials V: Novel Systems
O 94.4: Vortrag
Freitag, 5. April 2019, 11:15–11:30, H9
Investigation of two-dimensional germanium on Ag(110) by means of XPS — •Lukas Kesper1,2, Peter Roese1,2, Karim Shamout1,2, Ulf Berges1,2, and Carsten Westphal1,2 — 1Experimentelle Physik 1 - Technische Universität Dortmund, Otto-Hahn-Straße 4a, D-44221 Dortmund — 2DELTA - Technische Universität Dortmund, Maria-Goeppert-Mayer-Straße 2, D-44221 Dortmund
Since the discovery of graphene in 2004 the new field of two-dimensional materials in solid state physics expanded massively. Apart from graphene other Dirac materials, like silicene and germanene, for instance, provide similar properties in a two dimensional structure [1]. Because of their strong spin-orbit coupling and tunable band gap they are predestined for realising topological field effect transistor [2]. After the report of the first synthesis of silicene [3], one dimensional silicon nano-ribbons [4] on different substrates, we present two-dimensional germanium, epitaxially grown on a Ag(110) surface. The stronger buckling and spin-orbit coupling of germanene may allow to observe the quantum spin Hall effect [2, 5]. The structural investigation of the system Ge/Ag(110) was done by using Low Energy Electron Diffraction and X-Ray Photoelectron Spectroscopy at the U55 beamline 11 at DELTA.
[1] M. Ezawa et al., Riv. Nuovo Cimento 41, 175 (2018). [2] A. Molle et al., Nature Mat. 16, 163 (2017). [3] P. Vogt et al., PRL 108, 155501 (2012). [4] C. Léandri et al., Surf. Sci. 574, L9 (2005). [5] C.-C. Liu et al., PRL 107, 076802 (2011).