Dresden 2020 – scientific programme

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O: Fachverband Oberflächenphysik

O 31: Poster Session - Metal substrates: Structure, Epitaxy and Growth

O 31.4: Poster

Monday, March 16, 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.