Scaling of the energy gap in pattern-hydrogenated graphene

Abstract

Recent experiments show that a substantial energy gap in graphene can be induced via patterned hydrogenation on an iridium substrate. Here, we show that the energy gap is roughly proportional to $\sqrt{N_H}/N_C$ when disorder is accounted for, where $N_H$ and $N_C$ denote concentration of hydrogen and carbon atoms, respectively. The dispersion relation, obtained through calculation of the momentum-energy resolved density of states, is shown to agree with previous angle-resolved photoemission spectroscopy results. Simulations of electronic transport in finite size samples also reveal a similar transport gap, up to 1eV within experimentally achievable $\sqrt{N_H}/N_C$ value.

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• High Van Hove singularity extension and Fermi velocity increase in epitaxial graphene functionalized by gold clusters intercalation
• Stacking-configuration-enriched essential properties in bilayer silicenes
• Nanoscale view of engineered massive Dirac quasiparticles in lithographic superstructures
• Local Deformation of Matrix Words