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

Bikondoa, O; Moritz, W; Torrelles, X; Kim, HJ; Thornton, G; Lindsay, R; (2010) Impact of ambient oxygen on the surface structure of alpha-Cr2O3(0001). PHYS REV B , 81 (20) , Article 205439. 10.1103/PhysRevB.81.205439.

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Abstract

Surface x-ray diffraction has been employed to quantitatively assess the surface structure of alpha-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 x 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 alpha-Cr2O3(0001)

Type:Article
Title:Impact of ambient oxygen on the surface structure of alpha-Cr2O3(0001)
DOI:10.1103/PhysRevB.81.205439
Keywords:AB-INITIO, CR2O3, DIFFRACTION, V2O3(0001), ADSORPTION, ENERGY
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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