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

By Oier Bikondoa, W. Moritz, X. Torrelles, Hee-Joung Kim, G. Thornton and R. (Robert) Lindsay


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)

Topics: QC
Publisher: American Physical Society
Year: 2010
OAI identifier:

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