Abstract
Crystalline gold silicide formation on the Au(100) surface was studied using a scanning tunneling microscope. By introducing low coverage of Si on the Au surface at room temperature, the Au (5 × 20) reconstruction was partially transformed to disordered structure with islands. Island formation was discussed as the result of Si diffusion on the Au surface. Upon annealing below the eutectic temperature, the Au surface generally transformed to a metastable gold silicide structure. Structure of the observed surface was compared to former experimental results, showing good agreement.
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