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Co-adsorption of tin and potassium is found to induce a 3 1 reconstruction on the Ge(111) surface. A very small amount of tin influences the Ge 3d core level spectra substantially compared to the Ge(111)3 1:K reconstruction. This is interpreted as resulting from a relaxation of the strain in the rows Ge atoms running along the surface, as proposed for this structure.
The electronic properties of clean Si(110)16 2 and Si(110)2 3-Sb surfaces have been studied by angle resolved ultraviolet photoelectron spectroscopy (ARUPS) and surface differential reflectivity (SDR). For the clean 16 2 surface four surface states have been recognized by ARUPS and their dispersions have been mapped along the main symmetry lines in the surface Brillouin zone. SDR experiments...
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