Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 53: Nanostructures at Surfaces: Other Aspects

O 53.11: Poster

Dienstag, 21. März 2017, 18:30–20:30, P1C

Simulation of high energy XPD-patterns — •Robert Rauter, Christopher Kohlmann, Tobias Lühr, and Carsten Westphal — Experimentelle Physik I, TU Dortmund, Germany, Otto-Hahn-Str. 4, 44221 Dortmund

Photoelectron diffraction (XPD) is a powerful tool to examine surface and interlayer structures of solids. In order to extract the structural information from the experimental data, simulated XPD patterns are compared to experimental XPD patterns. For determining the correct structure a multiplicity of different surface and interface layer structures must be considered within the simulation.

The XPD pattern simulation is performed by the EDAC (Electron Diffraction in Atomic Clusters) package [1]. Reducing the quantity of simulations is achieved by utilizing a genetic algorithm [2]. We report on the improvement of convergence by applying the genetic algorithm in comparison to a deterministic approach.

[1]F.J. Garcia de Abajo, M.A. Van Hove and C.S. Fadley,
 Phys. Rev. B 63, 075404 (2001).
[2]Pancotti, A. et al., J. Appl. Phys. 106, 34104 (2009).
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