Abstract
The growth mode and surface structure of Ce thin films deposited on a Mo(110) surface were investigated by means of reflection high energy electron diffraction and scanning electron microscope. High temperature condensation above 500°C takes place according to the Stranski-Krastanov growth mode in which double layers grow initially, followed by the growth of Ce crystallites. The Ce two-dimensional double layers are composed of distorted fcc γ-Ce(111) layer and normal fcc γ-Ce(111) layer for the 1st and the 2nd layer, respectively. The Ce crystallites with the shape of flat islands are observed at high coverage. Epitaxial orientation relationship of 2nd monolayer and the crystallites is the Nishiyama-Wassermann relationship. However, low temperature condensation below 500°C takes place according to the Frank-van der Merwe growth mode.
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