Journal
PHYSICAL REVIEW B
Volume 61, Issue 4, Pages 3006-3011Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.61.3006
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Atomic structures of the clean Si(110)-16x2 surface are studied by scanning tunneling microscopy (STM). High-resolution STM images reveal that the elemental structure in the 16x2 is a pair of pentagons. In the empty-states images the elemental structure is clearly resolved in ten protrusions, while in eight in the filled-states images. In order to clarify the atomic arrangement of the pentagons, we pay attention to the disordered area where the elemental structures are isolated on the bulk-terminated surface. The bulk-terminated surface structure, on which the pentagons are located, is well understood by the rotational-relaxation structural model. In consideration of the registry of the pentagon for the rotational-relaxation structure, a tetramer-interstitial'' model is proposed for the elemental structure, together with three other possible structural models.
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