Abstract:Transmission electron diffraction and reflection high-energy electron diffraction have been used to study thermal vibrations at the InSb(111)A-(2ϫ2) surface. The surface In and Sb atoms show a large anisotropy in their vibrational amplitudes. In particular, contrary to common belief, the Debye temperature of surface In ͑Sb͒ atoms is larger than the corresponding bulk value in the directions normal ͑parallel͒ to the surface. We show that thermal vibrations in these directions are suppressed so as to maintain th… Show more
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