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In the homoepitaxy of Si(5512) at a finite temperature, 500°C, it has been found that one-dimensional elements composing of Si(5512)-2×1, such as honeycomb (H) chain, tetramer (T) row, and dimer-facing-adatom (D/A) row, transform for themselves with adding Si atoms. It turns out that a Si dimer is a basic building block, and selectively adsorbs on D/A sites of Si(5512)-2×1. Dimer-adsorption on a D/A...
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