The oxygen-saturated Fe(001)-p(1×1)O surface has been used as a template to stabilize two-dimensional Cr oxides on Fe(001). Cr deposition at 400 ∘C leads to two different well-ordered phases, depending on the amount of Cr deposited. In the submonolayer regime a novel c(4×2) overlayer self-assembles on the Fe(001)-p(1×1)O surface, saturating for a coverage of about 0.75 monolayers. This phase becomes unstable for higher coverages, when a (5√×5√)R27∘ superstructure emerges. The structural and electronic details of the two one-layer-thick oxides are studied by combining high-resolution scanning tunneling microscopy, low-energy electron diffraction, Auger electron spectroscopy, and density functional theory.

Self-organized chromium oxide monolayers on Fe(001) / A. Picone, G. Fratesi, M. Riva, G. Bussetti, A. Calloni, A. Brambilla, M. Trioni, L. Duò, F. Ciccacci, M. Finazzi. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 87:8(2013 Feb 04), pp. 085403.1-085403.7. [10.1103/PhysRevB.87.085403]

Self-organized chromium oxide monolayers on Fe(001)

G. Fratesi
Secondo
;
M.I. Trioni;
2013-02-04

Abstract

The oxygen-saturated Fe(001)-p(1×1)O surface has been used as a template to stabilize two-dimensional Cr oxides on Fe(001). Cr deposition at 400 ∘C leads to two different well-ordered phases, depending on the amount of Cr deposited. In the submonolayer regime a novel c(4×2) overlayer self-assembles on the Fe(001)-p(1×1)O surface, saturating for a coverage of about 0.75 monolayers. This phase becomes unstable for higher coverages, when a (5√×5√)R27∘ superstructure emerges. The structural and electronic details of the two one-layer-thick oxides are studied by combining high-resolution scanning tunneling microscopy, low-energy electron diffraction, Auger electron spectroscopy, and density functional theory.
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/232021
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