Structural analysis of FeO(1 1 1)/Ag(0 0 1): undulation of hexagonal oxide monolayers due to square lattice metal substrates

Iron oxide monolayers are grown on Ag(0 0 1) via reactive molecular beam epitaxy (metal deposition in oxygen atmosphere). The monolayer shows FeO stoichiometry as concluded from x-ray photoemission spectra. Both low energy electron diffraction as well as scanning tunneling microscopy demonstrate tha...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Condensed matter 2014-08, Vol.26 (31), p.315001-315001
Main Authors: Bruns, D, Kiesel, I, Jentsch, S, Lindemann, S, Otte, C, Schemme, T, Kuschel, T, Wollschläger, J
Format: Article
Language:English
Subjects:
Brackets
Condensed matter
Deposition
FeO monolayer
Lattices
Molecular structure
Monolayers
Scanning tunneling microscopy
Spectra
spot profile analysis low energy electron diffraction
unudulated monolayer
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Iron oxide monolayers are grown on Ag(0 0 1) via reactive molecular beam epitaxy (metal deposition in oxygen atmosphere). The monolayer shows FeO stoichiometry as concluded from x-ray photoemission spectra. Both low energy electron diffraction as well as scanning tunneling microscopy demonstrate that the FeO layer has a quasi-hexagonal (1 1 1) structure although deposited on a surface with square symmetry. Compared to bulk values, the FeO(1 1 1) monolayer is unidirectionally expanded by 3.4% in directions while bulk values are maintained in directions. In directions, this lattice mismatch between FeO(1 1 1) monolayer and Ag(0 0 1) causes a commensurate undulation of the FeO monolayer where 18 atomic rows of the FeO(1 1 1) monolayer match 17 atomic rows of the Ag(0 0 1) substrate. In directions, however, the FeO(1 1 1) monolayer has an incommensurate structure.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/26/31/315001