STRUCTURE OF INDIUM-ADSORBED SI(110) SURFACE

The structures of an indium-adsorbed Si(110) surface are investigated by LEED. Three specific LEED patterns (alpha, beta and gamma) are obse rved depending on the adsorption condition. The saturation coverages o f the corresponding alpha, beta and gamma structures are estimated as 0.2, 0.3 and 1.0 monolayers, respectively. The symmetries of these str uctures are discussed from I-V curves of LEED patterns. Models of the atomic arrangement are proposed on the basis of the symmetries of the LEED patterns.