A new wide band gap form of hydrogenated graphene

Abstract

We propose a new form of partially hydrogenated graphene in which hydrogen atoms lay in para position to each other, forming a honeycomb-shaped superlattice. This arrangement is shown to be favored by progressive preferential sticking events, while its particular lattice symmetry guarantees the presence of a wide band gap. With the help of first principles DFT and many-body calculations we find this structure to be an insulator, similarly to graphane.