Growth and structure of ultrathin praseodymium oxide layers on ruthenium(0001).
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.
Institute of Solid State Physics, University of Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany. flege@ifp.uni-bremen.de.
Jan
J
Höcker
Institute of Solid State Physics, University of Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany. flege@ifp.uni-bremen.de and MAPEX Institute for Materials and Processes, University of Bremen, D-28359 Bremen, Germany.
Jon-Olaf
JO
Krisponeit
Institute of Solid State Physics, University of Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany. flege@ifp.uni-bremen.de.
Julian
J
Cambeis
MAX IV Laboratory, Box 118, 221 00 Lund, Sweden.
Alexei
A
Zakharov
MAX IV Laboratory, Box 118, 221 00 Lund, Sweden.
Yuran
Y
Niu
Bremen Center for Computational Materials Science, Am Fallturm 1, D-28359 Bremen, Germany.
Gang
http://orcid.org/0000-0002-3838-8659
G
Wei
MAPEX Institute for Materials and Processes, University of Bremen, D-28359 Bremen, Germany and Bremen Center for Computational Materials Science, Am Fallturm 1, D-28359 Bremen, Germany.
Lucio
L
Colombi Ciacchi
Institute of Solid State Physics, University of Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany. flege@ifp.uni-bremen.de and MAPEX Institute for Materials and Processes, University of Bremen, D-28359 Bremen, Germany.
Jens
J
Falta
Division of Synchrotron Radiation Research, Lund University, 221 00 Lund, Sweden.
Andreas
A
Schaefer
Institute of Solid State Physics, University of Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany. flege@ifp.uni-bremen.de and MAPEX Institute for Materials and Processes, University of Bremen, D-28359 Bremen, Germany.
Jan Ingo
http://orcid.org/0000-0002-8346-6863
JI
Flege