Abstract
Atomic structures of the reconstructed Si(113) surfaces were studied by using Kikuchi electron holography (KEH). Three-dimensional images show clearly the characteristics of the puckering model for both Si(113)-(3x2) and (3x1) surfaces. The KEH results support the puckering model. Based on our studies, the tetramers are puckering alternatively in the (3x2) surface. Whereas in (3x1) structures, there are two domains, within each of them, tetramers buckled uniformly, but the overall directions are opposite. When doped with H atoms on a (3x2) surface, the asymmetric tetramers change into symmetric form. ©1999 The American Physical Society.