Structure determination of an adsorbate-induced multilayer reconstruction: (12)-H/Ni(110)
The reconstructed (1\xd72) structure formed by saturation of a Ni(110) surface with adsorbed H atoms at T<180 K was investigated by LEED. Excellent agreement between experimental and calculated I-V spectra for eleven nonequivalent beams was obtained for a model in which parallel rows of Ni atoms in the topmost layer are laterally shifted by 0.3 A\u030a (\u2018\u2018row pairing\u2019\u2019) and which exhibits periodic vertical displacements (\u2018\u2018buckling\u2019\u2019) of the atoms in the second layer.