Peculiar width dependence of the electronic properties of carbon nanoribbons

By M. Ezawa. 2006

639 citations recorded by the source corpus.

Nanoribbons (nanographite ribbons) are carbon systems analogous to carbon nanotubes. We characterize a wide class of nanoribbons by a set of two integers $⟨p,q⟩$, and then define the width $w$ in terms of $p$ and $q$. Electronic properties are explored for this class of nanoribbons. Zigzag (armchair) nanoribbons have similar electronic properties to armchair (zigzag) nanotubes. The band gap structure of nanoribbons exhibits a valley structure with streamlike sequences of metallic or almost metallic nanoribbons. These sequences correspond to equiwidth curves indexed by $w$. We reveal a peculiar dependence of the electronic property of nanoribbons on the width $w$.

Subfields: Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/4f40fb507514bab4185b83fa84bf5c9445198477

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In Materials Chemistry

Citations in the corpus

Electron and Phonon Properties of Graphene: Their Relationship with Carbon Nanotubes (2008, background): “tight-binding approximations based on the π-states of carbon [42, 43, 48] or on a two-dimensional Dirac equation with an effective speed of light (c∗ ∼ 1 × 10(6) m/s) [49–51].”
Spatially resolving edge states of chiral graphene nanoribbons (2011, background): “2c shows a higher resolution spectrum exhibiting energy-split edge-state peaks for a (5, 2) GNR having a width of 15.”
Emergence of magnetism in graphene materials and nanostructures (2010, background): “…nearest-neighbor tightbinding model predicts either metallic or semiconducting behavior for armchair nanoribbons (Barone et al., 2006; Brey et al., 2007; Ezawa, 2006; Nakada et al., 1996; Peres et al., 2006; Son et al., 2006a), and the two situations alternate as the nanoribbon’s width increases.”
First principle calculations of the electronic properties of nitrogen-doped carbon nanoribbons with zigzag edges (2008, positive): “The results are the same as those predicted with tight-binding model [3,8,9] and firstprinciple calculations [5,10,11].”