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Deformed Surface Oxides: Uncommon Structure of a (6x1) NiO Surface Oxide on Rh(111)

Autor(en)
Thomas Franz, Jan Zabloudil, Florian Mittendorfer, Luca Gragnaniello, Georg Parteder, Francesco Allegretti, Svetlozar L. Surnev, Falko P. Netzer
Abstrakt

We have investigated the formation of a nickel, oxide monolayer on Rh(111) by scanning tunneling microscopy (STM), high-resolution electron energy loss spectroscopy (HREELS), and density functional theory (DFT) calculations. This monolayer displays a corrugated (6 X 1) superstructure, with a formal Ni(5)O(5) stoichiometry. The interplay between polarity and interface energy leads to the formation of a structure with pronounced troughs, which may be regarded as a building deformation, containing building blocks derived from nonpolar (100) and polar (111) NiO surface terminations. The calculations also show that the (6 X 1) Ni(5)O(5) phase has a higher thermodynamic stability than the related octopolar NiO bulk terminations.

Organisation(en)
Computergestützte Materialphysik
Externe Organisation(en)
Karl-Franzens-Universität Graz
Journal
The Journal of Physical Chemistry Letters
Band
3
Seiten
186-190
Anzahl der Seiten
5
DOI
https://doi.org/10.1021/jz201527z
Publikationsdatum
2012
Peer-reviewed
Ja
ÖFOS 2012
103020 Oberflächenphysik
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/2053d3a4-2699-4fd8-a8fd-6f3201e382b2