Controlled large non-reciprocal charge transport in an intrinsic magnetic topological insulator MnBi2Te4

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<jats:title>Abstract</jats:title><jats:p>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. Of particular interest is whether the non-reciprocal transport can be manipulated. Here, we report the controllable large non-reciprocal charge transport in the intrinsic magnetic topological insulator MnBi<jats:sub>2</jats:sub>Te<jats:sub>4</jats:sub>. The current direction relevant resistance is observed at chiral edges, which is magnetically switchable, edge position sensitive and stacking sequence controllable. Applying gate voltage can also effectively manipulate the non-reciprocal response. The observation and manipulation of non-reciprocal charge transport reveals the fundamental role of chirality in charge transport of MnBi<jats:sub>2</jats:sub>Te<jats:sub>4</jats:sub>, and pave ways to develop van der Waals spintronic devices by chirality engineering.</jats:p>

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