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We present a combined experimental (scanning tunnelling microscopy) and theoretical (ab initio calculations) study of the atomic structure of Sb/Si(113). The structural unit of the clean Si(113)3 2 surface contains 3 elements: a pentamer above a subsurface interstitial atom, an adatom, and a tetramer. Because the subsurface interstitials are stable only at very low Sb coverages, we attempt to describe...
The carbon segregation at the Mo 0.75 Re 0.25 (100) surface was investigated by means of AES and quantitative LEED structure determination. The equilibrium surface carbon concentration is found to be a function of the bulk concentration and the annealing temperature. With increasing surface carbon concentration four different phases have been observed:...
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