We demonstrate two unusual electronic properties of semihydrogenated graphene with variable sized A- or B-hydrogenated domains within the tight-binding formalism as follows: (i) a universal band gap scaling law which states that the band gap depends linearly upon the ratio of the number of A- to B-hydrogenated atoms, NA/NB, reaching zero gap at N A = NB, but independent of the domain size, and (ii) an insulating state with zero band gap at NA = NB, a rare phenomenon in nature. We confirm this gapless insulator state by the zero optical conductance at low frequencies. © 2010 American Institute of Physics.
CITATION STYLE
Wright, A. R., O’Brien, T. E., Beaven, D., & Zhang, C. (2010). Gapless insulator and a band gap scaling law in semihydrogenated graphene. Applied Physics Letters, 97(4). https://doi.org/10.1063/1.3469941
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