Double-periodic quasi-periodic graphene superlattice: non-Bragg band gap and electronic transport
arXiv:1209.5811 · doi:10.1088/0022-3727/46/1/015306
Abstract
Electronic band gap and transport in quasi-periodic graphene superlattice of double-periodic sequence have been investigated. It is found that such quasi-periodic structure can possess a zero-averaged wave number (zero-) gap which associated with an unusual Dirac point. Different from Bragg gap, the zero- gap is less sensitive to the incidence angle, and robust against the lattice constants. The locations of Dirac point and multi-Dirac-points in the graphene superlattices of various sequences are also compared. The control of electron transport over the zero- band gap in graphene superlattice may facilitate the development of many graphene-based electronics.
arXiv comment8 pages, 11 figures
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