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A scanning tunneling microscopy (STM) study of the atomic structure of hydrogen-terminated Si(001) surfaces after wet cleaning is presented. Surface morphologies strongly depend on wet cleaning procedures. After being dipped into dilute HF solution, the surface is constructed by piling round, small terraces along the <110> direction. On the other hand, atomic rows along the <110> direction...
In order to investigate the role of oxygen atoms in the Si(111)1 1-7 7 phase transition, the transition was examined accurately under extremely high vacuum conditions (<4 10 -10 Pa). Transition temperature was measured for the modified-FZ crystal (resistivity; 4 10 4 Ω cm) in which the oxygen concentration was 7.0 10 15 atoms/cm 3 ,...
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