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Metal-semiconductor junction of graphene nanoribbons
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10.1063/1.2885095
/content/aip/journal/apl/92/8/10.1063/1.2885095
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/8/10.1063/1.2885095
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Figures

Image of FIG. 1.
FIG. 1.

Four types of metal-semiconductor (MS) junctions simulated. Armchair-edge GNR (A-GNR) index is 23 and 13 for metallic and semiconducting A-GNRs, respectively. They are named as (a) two-side dogbone, (b) two-side taper, (c) one-side dogbone, and (d) one-side taper structures. Triangles (case 1) and rectangles (case 2) show positions of defects as a single lattice vacancy at the MS junction.

Image of FIG. 2.
FIG. 2.

Conductance vs energy for the junctions shown in Fig. 1. Solid lines are for ideal structures, and dashed (case 1, triangles) and dash-dot lines (case 2, rectangles) are for the junctions in the presence of defects, as defined in Fig. 1. The dotted lines are for a uniform 13 A-GNR, which are plotted for a reference purpose.

Image of FIG. 3.
FIG. 3.

Current flow pattern. (a) Current flow pattern within the energy range of at for a two-side dogbone structure. (b) Current flow by the first subband (within the energy range of ) of the perfect two-side dogbone structure. (c) Current flow by the first subband of the two-side dogbone structure with a single lattice vacancy (case 1 as defined in Fig. 1, shown by the triangle). (d) Current flow pattern within the energy range of at for a one-side dogbone structure. The arrows are plotted in a relative scale for comparison.

Image of FIG. 4.
FIG. 4.

(a) Number of local states at each atomistic site (indicated by the radius of the circle) of a two-side taper structure within the energy range of . (b) The local density of states (LDOS) along the transport direction of the taper structure.

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/content/aip/journal/apl/92/8/10.1063/1.2885095
2008-02-26
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Metal-semiconductor junction of graphene nanoribbons
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/8/10.1063/1.2885095
10.1063/1.2885095
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