Theory of the electronic and transport properties of graphene under a periodic electric or magnetic field

Abstract

We discuss the novel electronic properties of graphene under an external periodic scalar or vector potential, and the analytical and numerical methods used to investigate them. When graphene is subjected to a one-dimensional periodic scalar potential, owing to the linear dispersion and the chiral (pseudospin) nature of the electronic states, the group velocity of its carriers is renormalized highly anisotropically in such a manner that the velocity is invariant along the periodic direction but is reduced the most along the perpendicular direction. Under a periodic scalar potential, new massless Dirac fermions are generated at the supercell Brillouin zone boundaries. Also, we show that if the strength of the applied scalar potential is sufficiently strong, new zero-energy modes may be generated. With the periodic scalar potential satisfying some special conditions, the energy dispersion near the Dirac point becomes quasi one-dimensional. On the other hand, for graphene under a one-dimensional periodic vector potential (resulting in a periodic magnetic field perpendicular to the graphene plane), the group velocity is reduced isotropically and monotonically with the strength of the potential.

arXiv comment8 pages, 4 figures

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• Emerging Dirac and Majorana fermions for carbon nanotubes with proximity-induced pairing and spiral magnetic field
• Localization behavior of Dirac particles in disordered graphene superlattices
• Electron transmission through a periodically driven graphene magnetic barrier
• Cloning of Zero Modes in One-Dimensional Graphene Superlattices
• The electronic structure and intervalley coupling of artificial and genuine graphene superlattice
• Protected Fermionic Zero Modes in Periodic Gauge Fields