2008/06/02 by Thomas Garm Pedersen, Thomas G. Pedersen, Christian Flindt +6 · 2 citations
Engineering · Materials Science · Physics and Astronomy · #2D Materials and Applications #Graphene and Nanomaterials Applications #Graphene research and applications #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.77.245431
published as Phys. Rev. B 77, 245431 (2008) · 11 pages, 9 figures, accepted for publication in Phys. Rev. B
arxiv created 2008/06/02 · openalex publication_date 2008/06/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Undoped graphene is semimetallic and thus not suitable for many electronic and optoelectronic applications requiring gapped semiconductor materials. However, a periodic array of holes (antidot lattice) renders graphene semiconducting with a controllable band gap. Using atomistic modeling, we demonstrate that this artificial nanomaterial is a dipole-allowed direct-gap semiconductor with a very pronounced optical-absorption edge. Hence, optical infrared spectroscopy should be an ideal probe of the electronic structure. To address realistic experimental situations, we include effects due to disorder and the presence of a substrate in the analysis.