The structure of the (110)-type p(1 x 2)-H surface, that resulted from saturation exposure to H2 at about 350K, was investigated by using time-of-flight scattering and recoil spectrometry methods. The scattered neutral plus ion flux, which resulted from a 4keV Ne+ beam that was incident upon the surface, was monitored as a function of crystal azimuthal angle and beam incidence angle along selected low-index azimuths. Classical trajectory simulators of the scattering events were compared with experimental data. The results for the (110)-type p(1 x 2) H-saturated surface were contrasted with results for the clean (110)-type p(1 x 1) surface and the (110)-type p(2 x 1) O-covered surface. Several different (1 x 2) reconstruction models were tested against the scattering results. Only the missing-row model, in which every other [1¯10]-type first-layer row was missing, was consistent with all of the experimental data.

C.Roux, H.Bu, J.W.Rabalais: Surface Science, 1991, 259[3], 253-65