• Corpus ID: 119201876

Graphene nanosystems and low-dimensional Chern-Simons topological insulators

@article{Jeong2015GrapheneNA,
  title={Graphene nanosystems and low-dimensional Chern-Simons topological insulators},
  author={Y. H. Jeong and S. R. Eric Yang},
  journal={arXiv: Mesoscale and Nanoscale Physics},
  year={2015}
}
A graphene nanoribbon is a good candidate for a $(1+1)$ Chern-Simons topological insulator since it obeys particle-hole symmetry. We show that in a finite semiconducting armchair ribbon, which has two zigzag edges and two armchair edges, a $(1+1)$ Chern-Simons topological insulator is indeed realized as the length of the armchair edges becomes large in comparison to that of the zigzag edges. But only a quasi-topological insulator is formed in a metallic armchair ribbon with a pseudogap. In such… 
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