Atomic structures and phase transitions of Si„113... reconstructed surfaces: Kikuchi electron holography studies
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چکیده
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!~332! and ~331! surfaces. The KEH results support the puckering model. Based on our studies, the tetramers are puckering alternatively in the ~332! surface. Whereas in ~331! 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 ~332! surface, the asymmetric tetramers change into symmetric form. @S0163-1829~99!51116-8#
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تاریخ انتشار 1999