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Topological gap states of semiconducting armchair …

In semiconducting armchair graphene ribbons a tensile strain can induce pairs of topological gap states with opposite energies. Near the critical value of the deformation potential these kink and antikink states become almost degenerate with zero energy and have a fractional charge of one-half.

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Metal doped armchair graphene nanoribbons: …

Functionalizing graphene to develop on-demand nanodevices is highly desirable, but still remains challenging. Here, we theoretically propose the functionalization of armchair graphene nanoribbons by low-concentration metal (M) atom (M = Ti, Ni, Sn, or Hg) doping and investigate the structural stability and electronic behaviors of these doped systems in depth.

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Spintronic Transport in Armchair Graphene …

The armchair graphene nanoribbon with terminal edges passivated by hydrogen is adsorbed on Ni(111) surfaces. The junction is labeled as M3, which denotes three units of overlap at each edge and four units in the bridge part. The blue, yellow, and white balls denote Ni, C, and H atoms, respectively.

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Armchair graphene nanoribbons: Electronic structure …

Armchair graphene nanoribbons (AGNRs) can be either metallic (N a = 3 m + 2, where m is an integer) or semiconductor (N a = 3 m and n = 3 m + 1) depending on their width lengths [3]. Unlike to ...

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Patterning Graphene with Zigzag Edges by …

A top‐down approach for controlled tailoring of graphene nanostructures with zigzag edges is presented. It consists of two key steps: artificial defect patterning and hydrogen‐plasma etching. With this approach, various graphene nanostructures with sub‐10 nm features and …

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Ultra-narrow metallic armchair graphene nanoribbons.

2015-12-14 · Graphene nanoribbons (GNRs)-narrow stripes of graphene-have emerged as promising building blocks for nanoelectronic devices. Recent advances in bottom-up synthesis have allowed production of atomically well-defined armchair GNRs with different widths and doping.

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Electronic Structure and Transport Properties of …

Abstract: Using first-principles electronic structure and transport calculations the electronic structure and transport properties of single layer armchair graphene nanoribbons with zigzag edges and the effect of edge-vacancy defects were investigated. It was shown that perfect armchair graphene nanoribbons were metallic ribbons. Though the electronic band structure may be affected by the edge ...

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Electronic states of graphene nanoribbons and …

2010-11-29 · There are two types of a graphene edge; armchair and zigzag edges. These two edges have a 30° difference in their orientation within the graphene sheet. Here we briefly discuss the origin of the large difference in the π electronic structures induced by the two types of graphene edges . In particular, a zigzag edge exhibits localized states ...