The structure of the (1 x 2) reconstruction induced by 0.1ML of Ca atoms on the Au(113) surface was reported, using medium-energy ion scattering. The data showed that the (1 x 2) surface corresponded to a missing-row-type reconstruction. Monte Carlo simulations of the experiment provided a quantitative measurement of the atomic positions at the surface. All the displacements in the surface region were such that the resulting structure smooths out the corrugation inherent in a missing-row reconstruction. The relationship between this reconstruction and the energy balance between competing surface-electronic-charge densities was considered.

Missing-Row Surface Reconstruction of Au(113) Induced by Adsorbed Calcium Atoms. Q.T.Jiang, T.Gustafsson, P.Häberle, D.M.Zehner: Physical Review B, 1992, 45, 14256-63