Impact of ambient oxygen on the surface structure of α -Cr 2 O3 (0001 )

Bikondoa, Oier; Moritz, Wolfgang; Torrelles, Xavier; Kim, H.J.; Thornton, G. und Lindsay, R. (2010): Impact of ambient oxygen on the surface structure of α -Cr 2 O3 (0001 ). In: Physical Review B - Condensed Matter and Materials Physics, Bd. 81, Nr. 20

Abstract

Surface x-ray diffraction has been employed to quantitatively assess the surface structure of α -Cr2 O3 (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 (CrO), clearly demonstrating that the presence of oxygen can significantly influence the structure of α -Cr2 O3 (0001).

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften > Kristallographie und Materialwissenschaft
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• Sprache: Englisch