The quantum anomalous Hall effect^1,2 is a fundamental transport response of a topological insulator in zero magnetic field. Its physical origin is a result of an intrinsically inverted electronic band structure and ferromagnetism³, and its most important manifestation is the dissipationless flow of chiral charge currents at the edges of the system⁴, a property that has the potential to transform future quantum electronics^5,6. Here, we report a Berry-curvature-driven^4,7 anomalous Hall regime at temperatures of several Kelvin in the magnetic topological bulk crystals in which Mn ions self-organize into a period-ordered MnBi₂Te₄/Bi₂Te₃ superlattice. Robust ferromagnetism of the MnBi₂Te₄ monolayers opens a surface gap^8,9,10, and when the Fermi level is tuned to be within this gap, the anomalous Hall conductance reaches an e²/h quantization plateau, which is a clear indication of chiral transport through the edge states. The quantization in this regime is not obstructed by the bulk conduction channels and therefore should be present in a broad family of topological magnets.

量子异常霍尔效应^1,2是拓扑绝缘子在零磁场中的基本输运响应。它的物理起源是固有的电子能带结构和铁磁性^3的结果，它最重要的表现是在系统⁴的边缘处手性电荷电流的无耗散流动，这种性质具有改变未来量子电子学⁵的潜力。^，6。在这里，我们报道了在磁性拓扑体晶体中几个开尔文温度下，贝里曲率驱动的^4,7异常霍尔状态，其中锰离子自组织成周期有序的MnBi ₂ Te ₄ / Bi ₂ Te_3个超晶格。MnBi ₂ Te ₄单层的稳健铁磁性打开了表面间隙^8,9,10，当费米能级被调整到该间隙内时，霍尔电导异常达到e ² / h量化平台，这清楚地表明通过边缘状态的手性传输。在这种情况下，量子化不会受到整体传导通道的阻碍，因此应存在于广泛的拓扑磁铁家族中。