Atomic structures of the clean Si(110)-(16 x 2) surface were studied by using scanning tunnelling microscopy. High-resolution scanning tunnelling microscopic images revealed that the elemental structure in the 16 x 2 was a pair of pentagons. In the empty-states images, the elemental structure was clearly resolved into 10 protrusions; or 8 in filled-states images. In order to clarify the atomic arrangement of the pentagons, attention was paid to the disordered area where the elemental structures were isolated on the bulk-terminated surface. The bulk-terminated surface structure, upon which the pentagons were located, was well-described by the rotational-relaxation structural model.

Elemental Structure in Si(110)-“16 x 2” Revealed by Scanning Tunneling Microscopy. T.An, M.Yoshimura, I.Ono, K.Ueda: Physical Review B, 2000, 61, 3006-11