Macroscopic one-dimensional facetting of Si(100) upon Au adsorption
Vicinal Si(100) (4°) shows perfectly ordered terraces with a width of 4 nm separated by double steps. Adsorption of Au at 800°C results in a dramatic change of the step morphology: the surface decomposes into areas which are perfectly flat with a (100)-orientation and - facets, which compensate the macroscopic miscut. Macroscopic super terraces with a width of 400 nm up to 4 μm are formed, which are extremely straight with a length limited only by the size of the sample.
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