Scaling of the energy gap in pattern-hydrogenated graphene

Roberto Grassi, Tony Low, Mark Lundstrom

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

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 languageEnglish (US)
Pages (from-to)4574-4578
Number of pages5
JournalNano letters
Volume11
Issue number11
DOIs
StatePublished - Nov 9 2011

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