LEED I/V determination of the structure of a MoO3 monolayer on Au(111): Testing 
the performance of the CMA-ES evolutionary strategy algorithm, differential 
evolution, a genetic algorithm and tensor LEED based structural optimization

Primorac, Elena; Kuhlenbeck, Helmut; Freund, Hans-Joachim

doi:10.1016/j.susc.2016.01.030

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LEED I/V determination of the structure of a MoO₃ monolayer on Au(111): Testing the performance of the CMA-ES evolutionary strategy algorithm, differential evolution, a genetic algorithm and tensor LEED based structural optimization

MPG-Autoren

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Primorac, Elena
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Kuhlenbeck, Helmut
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Freund, Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Zitation

Primorac, E., Kuhlenbeck, H., & Freund, H.-J. (2016). LEED I/V determination of the structure of a MoO₃ monolayer on Au(111): Testing the performance of the CMA-ES evolutionary strategy algorithm, differential evolution, a genetic algorithm and tensor LEED based structural optimization. Surface Science, 649, 90-100. doi:10.1016/j.susc.2016.01.030.

Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002A-127C-B

Zusammenfassung

The structure of a thin MoO₃
layer on Au(111) with a c(4 × 2) superstructure was studied with LEED I/V
analysis. As proposed previously (Quek et al., Surf. Sci. 577 (2005) L71), the atomic structure of the layer is similar to that of a MoO₃
single layer as found in regular α-MoO₃. The layer on Au(111) has a glide plane
parallel to the short unit vector of the c(4 × 2) unit cell and the molybdenum atoms are bridge-bonded to two surface gold atoms with the structure of the gold surface being slightly distorted. The structural
refinement of the structure was performed with the CMA-ES evolutionary strategy algorithm which could reach a Pendry R-factor of ∼0.044. In the second part the performance of CMA-ES is compared with that of the differential evolution method, a genetic algorithm and the Powell optimization algorithm employing I/V
curves calculated with tensor LEED.