Massless Dirac fermions in a graphene superlattice: aT-matrix approach

Abstract

Using the T-matrix approach, we study the effect of a Kronig–Penney periodic potential on theelectronic states and the transport properties of graphene. The energy band structure andthe group velocity of charge carriers are calculated and discussed in detail for potentialswith varying amplitudes and barrier-to-well width ratios. The periodic potential is shownto cause a resonant structure and to enhance the magnitude of the conductivity.