Surface structure determination from scattering and recoiling: W(211) and W(211)-p(1×2)-O

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Abstract
Time-of-flight scattering and recoiling spectrometry with detection of both neutrals and ions for structure determinations is presented and applied to the clean W(211)-p(1×1) and W(211)-p(1×2)-O structures. Experimental data are presented in the form of scattering and recoiling intensities versus beam incident angle and scattering and recoiling structural contour maps. The clean surface is relaxed both laterally and vertically from the bulk truncated structure. Oxygen atoms occupy threefold trough sites where they are bound to two first-layer and one second-layer W atoms.