Symmetry breaking in quantum materials is of great importance and can lead to non-reciprocal charge transport. Topological insulators provide a unique platform to study non-reciprocal charge transport due to their surface states, especially quantum Hall states under an external magnetic field. Here we report the observation of non-reciprocal charge transport mediated by quantum Hall states in devices composed of the intrinsic topological insulator Sn–Bi_1.1Sb_0.9Te₂S, which is attributed to asymmetric scattering between quantum Hall states and Dirac surface states. A giant non-reciprocal coefficient of up to 2.26 × 10⁵ A⁻¹ is found. Our work not only reveals the properties of non-reciprocal charge transport of quantum Hall states in topological insulators but also paves the way for future electronic devices.

量子材料中的对称性破缺非常重要，可以导致非互易电荷传输。拓扑绝缘体提供了一个独特的平台来研究由于其表面态而产生的不可逆电荷传输，特别是外部磁场下的量子霍尔态。在这里，我们报告了在由本征拓扑绝缘体 Sn-Bi _1.1 Sb _0.9 Te ₂ S 组成的器件中观察到的由量子霍尔态介导的非互易电荷传输，这归因于量子霍尔态和狄拉克表面态之间的不对称散射。发现了高达 2.26 × 10 ⁵  A ^-1的巨大非互易系数。我们的工作不仅揭示了拓扑绝缘体中量子霍尔态的非互易电荷传输特性，而且为未来的电子器件铺平了道路。