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. © 2013 American Physical Society.
Picone, A., Fratesi, G., Riva, M., Bussetti, G., Calloni, A., Brambilla, A., et al. (2013). Self-organized chromium oxide monolayers on Fe(001). PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 87(8), 085403-085409 [10.1103/PhysRevB.87.085403].
Self-organized chromium oxide monolayers on Fe(001)
FRATESI, GUIDO;
2013
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. © 2013 American Physical Society.
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