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Research Highlights

Growth and structure of ultrathin praseodymium oxide layers on ruthenium (0001)

Jan Höcker, Jon-Olaf Krisponeit, Julian Cambeis, Alexei Zakharov, Yuran Niu, Gang Wei, Lucio Colombi Ciacchi, Jens Falta, Andreas Schaefer and Jan Ingo Flege 

Physical Chemistry Chemical Physics (2017) 19, 3480-3485

https://doi.org/10.1039/C6CP06853G

The growth, morphology, structure, and stoichiometry of ultrathin praseodymium oxide layers on Ru(0001) were studied using low-energy electron microscopy and diffraction, photoemission electron microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. At a growth temperature of 760 °C, the oxide is shown to form hexagonally close-packed (A-type) Pr2O3(0001) islands that are up to 3 nm high. Depending on the local substrate step density, the islands either adopt a triangular shape on sufficiently large terraces or acquire a trapezoidal shape with the long base aligned along the substrate steps.

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