Atomic structures and phase transitions of Si(113) reconstructed surfaces: Kikuchi electron holography studies

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)-(3\ifmmode\times\else\texttimes\fi{}2) and (3\ifmmode\times\else\texttimes\fi{}1) surfaces. The KEH results support the puckering model. Based on our studies, the tetramers are puckering alternatively in the (3\ifmmode\times\else\texttimes\fi{}2) surface. Whereas in (3\ifmmode\times\else\texttimes\fi{}1) 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 (3\ifmmode\times\else\texttimes\fi{}2) surface, the asymmetric tetramers change into symmetric form.