Chiral interactions in magnetic systems can give rise to rich physics manifested, for example, as nontrivial spin textures. The foremost interaction responsible for chiral magnetism is the Dzyaloshinskii-Moriya interaction (DMI), resulting from inversion symmetry breaking in the presence of strong spin-orbit coupling. However, the atomistic origin of DMIs and their relationship to emergent electrodynamic phenomena, such as topological Hall effect (THE), remain unclear. Here, we investigate the role of interfacial DMIs in 3d–5d transition metal-oxide-based LaMnO₃/SrIrO₃ superlattices on THE from a chiral spin texture. By additively engineering the interfacial inversion symmetry with atomic-scale precision, we directly link the competition between interfacial collinear ferromagnetic interactions and DMIs to an enhanced THE. The ability to control the DMI and resulting THE points to a pathway for harnessing interfacial structures to maximize the density of chiral spin textures useful for developing high-density information storage and quantum magnets for quantum information science.

磁性系统中的手性相互作用可引起丰富的物理现象，例如表现为非平凡的自旋纹理。引起手性磁性的最重要的相互作用是Dzyaloshinskii-Moriya相互作用（DMI），这是由于在强自旋轨道耦合的情况下反对称对称性破裂而引起的。但是，DMI的原子起源及其与新兴的电动力学现象（如拓扑霍尔效应（THE））的关系仍不清楚。在这里，我们研究了界面DMI在3 d – 5 d过渡金属氧化物基LaMnO ₃ / SrIrO _{3中的作用}从手征旋转纹理上的超晶格。通过以原子级精度累加工程化界面反演对称性，我们将界面共线铁磁相互作用与DMI之间的竞争直接联系到增强的THE。控制DMI的能力以及由此产生的THE指向利用界面结构最大化手性自旋织构密度的途径，可用于开发高密度信息存储和用于量子信息科学的量子磁体。