More than one monolayer adsorption of oxygen on the W(112) surface

Quantitative analysis of data obtained using Auger-electron spectroscopy and low-energy electron diffraction (LEED) indicate that the p(1×2) structure of oxygen chemisorbed on a W(112) surface corresponds to a coverage of 1.5 monolayer. A possible second-layer adsorption model is proposed to describe the p(1×2) structure. The densities of the antiphase boundaries created in the p(1×2) structure formed at 190- and 300-K adsorption temperatures are obtained by quantitative analysis of the angular intensity distribution of LEED beams.