Engineering the Band Topology in a Rhombohedral Trilayer Graphene Moiré Superlattice
Xiangyan Han,
Qianling Liu,
Yijie Wang
et al.
Abstract:Moiré superlattices have become a fertile playground
for
topological Chern insulators, where the displacement field can tune
the quantum geometry and Chern number of the topological band. However,
in experiments, displacement field engineering of spontaneous symmetry-breaking
Chern bands has not been demonstrated. Here in a rhombohedral trilayer
graphene moiré superlattice, we use a thermodynamic probe and
transport measurement to monitor the Chern number evolution as a function
of the displacement field. At… Show more
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