Regensburg 2022 – scientific programme
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O: Fachverband Oberflächenphysik
O 65: 2D Materials 2: Growth, Structure and Substrate Interaction
O 65.2: Talk
Thursday, September 8, 2022, 10:45–11:00, S052
Investigation of sub-monolayer Sn phases on Au(111) — •Julian Andreas Hochhaus1,2, Lukas Kesper1,2, Stefanie Hilgers1, Ulf Berges1,2, and Carsten Westphal1,2 — 1Technische Universität Dortmund, Fakultät Physik, Otto-Hahn-Str. 4, D-44227, Dortmund, Germany — 2DELTA, TU Dortmund, Maria-Goeppert-Mayer-Str. 2, D-44227, Dortmund, Germany
In this study we investigate the temperature and layer thickness dependence of sub-monolayer phases of Sn on Au(111).
Stanene, the two-dimensional graphene analog of tin, is predicted to exhibit similar exceptional electronic properties.
Since tin is one of the heavier elements in the carbon group, stanene exhibits topological properties even at RT due to its strong spin-orbit coupling.
Therefore, stanene is a promising material for application in future two-dimensional topological devices.
Since the surface and interface structure of low-dimensional materials often influences their electronic properties, we focus on the structural and chemical analysis of the Sn/Au interface.
Here, we report a structural and chemical investigation of different sub-monolayer Sn phases on Au(111) by means of low energy electron diffraction (LEED) and photoelectron spectroscopy (XPS). Tin layers of different thicknesses were deposited gradually on the Au(111) surface by physical vapor deposition and subsequently heated. A strong dependence of the structural and chemical configuration of the tin atoms on the layer thickness and the post-deposition annealing temperature was observed.