ON THE STRUCTURE OF SI(113)

The structure of the (113) face of Si has received a large amount of interest recently because of its high stability, despite having a high index. There remains some controversy about the surface reconstruction, various groups having reported observations of both 3 x 1 and 3 x 2 structures. We have obtained atomically resolved STM images of this surface showing areas of 3 x 1 reconstructed surface, the structure of which matches a modified version of a previously proposed model. In addition we have also obtained CITS images showing the complex underlying reconstruction and spectroscopy measurements which are comparable with a recent ARUPS study of the same surface.