Abstract
Surface ordered structures of Ag deposited on a Mo(110) surface have been studied by RHEED. Room temperature condensation of Ag on the Mo surface exhibits a Frank-van der Merwe growth mode. However, with high temperature condensation above 400°C a two-dimensional Ag(111) epitaxial layer with the Kurdjumov-Sachs orientation relationship appears at one monolayer deposition. Elevating the temperature of the film deposited with one monolayer several surface ordered phases appear. At 650°C, the surface structure changes from the Ag(111) layer to [0291] structure, and at 700°C it changes to a 2×2 structure. At 750°C, the 2×2 structure vanishes to yield a 1×1 structure of the clean Mo surface. Continuing deposition of Ag on the Mo surface kept at temperature between 400°C to 600°C, the Ag(111) layer is completed at one monolayer deposition, followed by Ag island growth, showing that the growth of Ag takes place in accordance with the Stranski-Krastanov growth mode.
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