Atomic structure of the InSb(001)-c(8×2) reconstruction determined by X-ray diffraction

Evidence from scanning tunneling microscopy in support of a structural model for the InSb(001)-c(8×2) surface

“…8 This model is characterized by chains of metallic bonded indium atoms extending along the ͓110͔ direction, separated by pairs of Sb dimers, with both the metallic indium and the Sb dimers residing on top of an Sb terminated bulk structure. In this letter we present evidence from high resolution filled and empty state STM images which strongly support this structural model for the InSb(001)-c(8ϫ2) surface.…”

“…Because of their prominence at both positive and negative bias voltages, these features are attributed to states associated with metallic bonding in the In rows. 8 Metallic bonding generally requires high coordination numbers and the arrangement of what is effectively a triple row of In atoms along the ͓110͔ direction, separated by the same interatomic distance observed in indium metal, satisfies this condition. We therefore identify the A features in Figs.…”

Self-assembled molecular chains formed by selective adsorption of lead–phthalocyanine on InSb(100)-(4×2)/c(8×2)

“…They conclude that the stripes similarly present on the clean InAs͑100͒ surface are formed by In atoms with metallic character and they exclude the presence of As atoms in the stripes. On this basis, we think that the stripes on the clean InSb surface are also formed by In atoms only, as proposed in the model of Jones et al 8 ͑cf. Fig.…”

“…Relying on the reconstruction model of the (4ϫ2)/c(8 ϫ2) surface of the InSb͑100͒ substrate proposed by Jones et al, 8 we propose a geometrical arrangement of the molecules, although we cannot eventually exclude the second model proposed by Kumpf et al 9 Figure 2 shows this first atomic model of the InSb(100)-(4ϫ2)/c(8ϫ2) reconstruction together with few model PbPc molecules. The PbPc model molecule, shown at the bottom of Fig.…”

“…Two geometrical models differently describe this reconstruction with respect to LEED, x-ray diffraction, and STM measurements. According to the first model proposed by Jones et al, 8 the stripes are formed by indium chains, while in the second model proposed by Kumpf et al,9 they are formed by both indium and antimony atoms. Our STM observations reveal that the PbPc molecules adsorb selectively on these stripes only, with their macrocycle oriented parallel to the surface plane and with the central lead atom in direct contact with the topmost atoms of the stripes.…”