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Impact of ambient oxygen on the surface structure of α-Cr2O3(0001)

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Bikondoa, Oier, Moritz, W., Torrelles, X., Kim, Hee-Joung, Thornton, G. and Lindsay, R. (Robert). (2010) Impact of ambient oxygen on the surface structure of α-Cr2O3(0001). Physical Review B (Condensed Matter and Materials Physics), Vol.81 (No.20). Article 5439. ISSN 1098-0121

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Abstract

Surface x-ray diffraction has been employed to quantitatively assess the surface structure of α-Cr2O3(0001) as a function of oxygen partial pressure at room temperature. In ultrahigh vacuum, the surface is found to exhibit a partially occupied double layer of chromium atoms. At an oxygen partial pressure of 1×10−2 mbar, the surface is determined to be terminated by chromyl species (CrO), clearly demonstrating that the presence of oxygen can significantly influence the structure of α-Cr2O3(0001).

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): X-rays -- Diffraction, Surfaces (Physics) -- Research, Oxide coating -- Research, Adsorption -- Research
Journal or Publication Title: Physical Review B (Condensed Matter and Materials Physics)
Publisher: American Physical Society
ISSN: 1098-0121
Official Date: 26 May 2010
Volume: Vol.81
Number: No.20
Page Range: Article 5439
Identification Number: 10.1103/PhysRevB.81.205439
Status: Peer Reviewed
Access rights to Published version: Open Access
Funder: Engineering and Physical Sciences Research Council (EPSRC), Spain. Ministerio de Ciencia e Innovación (MICINN), European Union (EU)
Grant number: CSD2007-00041 (MICINN), MAT2009-09308 (MICINN)
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URI: http://wrap.warwick.ac.uk/id/eprint/3311

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