Interaction effects in ultra-clean ABC trilayer/hexagonal boron nitride moire heterostructures

ABC-stacked trilayer graphene aligned to hexagonal boron nitride hosts narrow, isolated low energy bands which have been shown to ferromagnetism and superconductivity. In addition, these bands can be tuned with an out-of-plane electric field. The main challenge of fabricating this type of samples is the metastability of the ABC-stacking order, which tends to relax to the lower-energy ABA-stacking during the fabrication process. Here we will describe techniques to identify and isolate ABC domains in trilayer graphene and incorporate them into dual-graphite gated heterostructures while preserving the stacking order. Preliminary transport data reveals electric field tunable transitions between resistive states at partial band filling.