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 NH1/2/N C when disorder is accounted for, where NH and N C denote concentrations 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 1 eV within experimentally achievable NH1/2/NC values.
Original language | English (US) |
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Pages (from-to) | 4574-4578 |
Number of pages | 5 |
Journal | Nano letters |
Volume | 11 |
Issue number | 11 |
DOIs | |
State | Published - Nov 9 2011 |