Observation of Hysteresis in Rhombohedral-Stacked Trilayer Graphene

Few-layer graphene is an attractive platform for exploration of physical processes~confined to two dimensions. Diverging density of states in rhombohedral-stacked~trilayer graphene (r-TLG) leads to strong electronic correlation. Recently an intrinsic insulating phase with 40 meV gap has been observed at charge~neutrality point (CNP) in r-TLG, which is consistent with an layer antiferromagnetic state.~By using~dual-gated suspended r-TLG device, we observe hysteresis loops in conductance in the~vicinity of CNP, which suggests the possible evidence of spontaneous spin polarization or presence of domains with different anomalous Hall conductivities.