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O: Fachverband Oberflächenphysik
O 31: Poster Session - Metal substrates: Structure, Epitaxy and Growth
O 31.4: Poster
Montag, 16. März 2020, 18:15–20:00, P1C
Al2Cu(001) studied by photo electron spectroscopy — •Holger Schwarz1, Niels Rösch1, Stefan Püschel2, Peter Gille2, Marc Armbrüster3, and Thomas Seyller1 — 1Institute of Physics, TU Chemnitz, Chemnitz, Germany — 2Department of Earth and Environmental Sciences, LMU München, München, Germany — 3Institute of Chemistry, TU Chemnitz, Chemnitz, Germany
Intermetallic compounds have received interest because of their performance as catalysts in, e.g., hydrogenation reactions. However, compared to the enormous number of surface studies on pure metals and on alloys, there are considerably fewer studies on the surface properties of intermetallic compounds.
Recently, Al2Cu(001) showing a (2√2×√2)R45∘ reconstruction was studied using low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM) in combination with ab initio calculations [1]. A structure model was derived which consists of a bulk termination with incomplete Al planes. The aim of our work is to further characterize the Al2Cu(001) surface by additional techniques, in particular X-ray photoelectron spectroscopy (XPS) and angle-resolved photoelectron spectroscopy (ARPES). The poster will present and discuss first results of our work, focusing on surface composition and structure as well as electronic structure.
[1] L. N. Serkovic Loli, et al., Phys. Rev. Lett. 108 (2019) 146101.