A SURFACE-STRUCTURE MODEL FOR SI(337)

The surface reconstruction on Si(337) at room temperature has been stu died by low energy electron diffraction (LEED). It has been found that : (I) the Si(337) gave a clear LEED pattern which indicates the existe nce of another high index stable surface besides Si(113); (II) in addi tion to a strong Si(337)-(1 X 1), we observed for the first time a (2 X 1) LEED pattern indicating a surface reconstruction along the [1(1) over bar0$] direction; (III) a surface model has been proposed for the observed Si(337)-(2 X 1) structure.