UHV-TEM-REM Studies of Si(111) Surfaces

概要

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Recent progresses of ultra-high vacuum transmission and reflection electron microscope studies of clean Si(111) surfaces are described. Anisotropy of surface atomic steps such as step energy, bunching of steps, are studied. Out of phase boundaries are observed in transmission mode and its energy relative to the step energy is studied. The phase transition between the 1×1 and the 7×7 structures around 830℃. studied previously is re-examined under various conditions. Contraction strains of the 7×7 structure and adatom density on terraces play important role during the transition. Diffuse scattering observed by LEED and RHEED above the transition temperature is not observed in the TED pattern from a thin film.
理論物理学刊行会の論文
1992-02-25