  Symmetries, quantum geometries and electronic correlations are among the most
important ingredients of condensed matters, and lead to nontrivial phenomena in
experiments, for example, non-reciprocal charge transport. Here we report the
non-reciprocal charge transport in the intrinsic magnetic topological insulator
MnBi2Te4. The current direction relevant resistance is observed at chiral
edges, which is magnetically switchable, edge position sensitive and septuple
layer number controllable. Applying gate voltage can effectively tune the
non-reciprocal resistance. The observation and manipulation of non-reciprocal
charge transport indicate the fundamental role of chirality in charge transport
of MnBi2Te4, and pave ways to develop van der Waals spintronic devices by
chirality engineering.
