Adsorbate-induced reconstruction on transition-metal and noble-metal surfaces

Abstract The structures of (2×1) O on Ni (110) and c(2×2)N on Ni (100) are studied with a full multiple scattering analysis of the NEXAFS. On Ni (110) the O is found to induce a sawtooth reconstruction with an accompanying O tilt toward the (100) facet. On Ni (100), N occupies a fourfold hollow site and induces a p4g reconstruction of the top Ni layer with the nearest Ni atoms rotated by a tangential displacement of ≈0.7A. Both structures agree with the associated SEXAFS analysis.