Energy band gaps in graphene nanoribbons with corners

Dominik Szczśniak, Artur P. Durajski, Antoine Khater, Doried Ghader

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3 Citations (Scopus)

Abstract

In the present paper, we study the relation between the band gap size and the corner-corner length in representative chevron-shaped graphene nanoribbons (CGNRs) with 120° and 150° corner edges. The direct physical insight into the electronic properties of CGNRs is provided within the tight-binding model with phenomenological edge parameters, developed against recent first-principle results. We show that the analyzed CGNRs exhibit inverse relation between their band gaps and corner-corner lengths, and that they do not present a metal-insulator transition when the chemical edge modifications are introduced. Our results also suggest that the band gap width for the CGNRs is predominantly governed by the armchair edge effects, and is tunable through edge modifications with foreign atoms dressing.

Original languageEnglish
Article number48001
JournalEPL
Volume114
Issue number4
DOIs
Publication statusPublished - 1 May 2016
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Szczśniak, D., Durajski, A. P., Khater, A., & Ghader, D. (2016). Energy band gaps in graphene nanoribbons with corners. EPL, 114(4), [48001]. https://doi.org/10.1209/0295-5075/114/48001