Title: Electronic structure of transferred graphene/h-BN van der Waals heterostructures with nonzero stacking angles by nano-ARPES,
Abstract: In van der Waals heterostructures, the periodic potential from the Moiré
superlattice can be used as a control knob to modulate the electronic structure
of the constituent materials. Here we present a nanoscale angle-resolved
photoemission spectroscopy (Nano-ARPES) study of transferred graphene/h-BN
heterostructures with two different stacking angles of 2.4° and 4.3°
respectively. Our measurements reveal six replicas of graphene Dirac cones at
the superlattice Brillouin zone (SBZ) centers. The size of the SBZ and its
relative rotation angle to the graphene BZ are in good agreement with Moiré
superlattice period extracted from atomic force microscopy (AFM) measurements.
Comparison to epitaxial graphene/h-BN with 0° stacking angles suggests
that the interaction between graphene and h-BN decreases with increasing
stacking angle.