Moire superlattice effects in graphene/boron-nitride van der Waals   heterostructures
  Van der Waals heterostructures of graphene and hexagonal boron nitride feature a moir\'e superlattice for graphene's Dirac electrons. Here, we review the effects generated by this superlattice, including a specific miniband structure featuring gaps and secondary Dirac points, and a fractal spectrum of magnetic minibands known as Hofstadter's butterfly. 
J. R. Wallbank, M. Mucha-Kruczynski, Xi Chen, V. I. Fal'ko
cond-mat.mes-hall