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Graphene-like silicon nanoribbons on Ag(110): A possible formation of silicene
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View: Figures


Image of FIG. 1.
FIG. 1.

STM images of straight, parallel 1D silicon nanostructures grown on a Ag(110) surface. (a) Large view (, filled states); (b) 3D view (, filled states); and (c) detailed view (, filled states). Line profiles indicate the periodicity along each line of protrusions ( direction) and the asymmetrical shape along the orthogonal direction. The geometrical aspect of the silicon NRs (a square joined to a parallelogram) is drawn in black.

Image of FIG. 2.
FIG. 2.

Atomic structure of silicon NRs: (a) high resolution filled state STM image revealing honeycomb arrangement (few honeycombs are drawn on the image); (b) ball model of the corresponding calculated atomic structure (large dark balls (blue)) representing Ag atoms in the first layer; top most Si atoms are represented by small dark balls (red) while others represented by light small balls (green), the whole forming hexagons (highlighted on the silicon NR).

Image of FIG. 3.
FIG. 3.

Calculated atomic and electronic structures of graphene-like silicon NRs: (a) ball model in cross section (large dark balls (blue): first layer Ag atoms and Si atoms are small dark balls (red)); (b) charge density in cross section.

Image of FIG. 4.
FIG. 4.

Experimental and calculated usual STM images: (a) filled state STM image of an individual NR showing the structural signature made of a square adjacent to a parallelogram (drawn in black) and (b) calculated STM image showing a similar structural signature.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Graphene-like silicon nanoribbons on Ag(110): A possible formation of silicene