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We will discuss a two-dimensional electron system originating from a surface-state band and especially its electronic transport properties. We have found a surface superstructure that has a highly conductive surface-state band, the Si(111)-√21 √21R±10.89° structure, induced by adsorption of a 0.14-atomic-layer of Au or Ag onto a Si(111)-√3 √3-Ag surface. Photoemission spectroscopies showed that...
Ultra-high vacuum scanning tunneling microscopy and depth profiling X-ray photoelectron spectroscopy were used to evaluate two methods for cleaning Si 1-x Ge x (001) films using in-situ surface oxidation followed by in-situ oxide desorption at temperatures 1025°C. Dry ultra-violet ozone cleaning was found to be fast, simple, and highly effective for cleaning Si 1 ...
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