The family of Hall effects has long served as a premier probe of how symmetry, magnetic order, and topology intertwine in solids. Recently, the in-plane anomalous Hall effect (IP-AHE), a transverse Hall response driven by in-plane magnetization, has emerged as a distinct member of this family, offering innovative spintronic functionalities and illuminating intricate interplay between mirror-symmetry breaking and in-plane magnetic order. However, practical routes to deterministically and reversibly control IP-AHE remain limited. Here, we establish a symmetry-engineered IP-AHE platform, CaRuO3/La2/3Ca1/3MnO3/CaRuO3 heterostructure on NdGaO3(110), that turns strict mirror-symmetry breaking constraints into effective tuning knobs. IP-AHE in these epitaxial trilayers unambiguously couples to the CaRuO3-buffer-induced mirror-symmetry breaking and faithfully reproduces the ferromagnetic hysteresis. Ionic liquid gating further enables reversible reconfigurations of the symmetry breaking, thereby achieving electrical modulation and ON/OFF switching of IP-AHE. This highly tunable IP-AHE platform opens pathways for exploring nontrivial magnetic order and developing programmable Hall functionalities in planar geometries.
@article{arxiv.2601.05462,
title = {Symmetry-engineered and electrically tunable in-plane anomalous Hall effect in oxide heterostructures},
author = {Kunjie Dai and Zhen Wang and Wenfeng Wu and Feng Jin and Enda Hua and Nan Liu and Jingdi Lu and Jinfeng Zhang and Yuyue Zhao and Linda Yang and Kai Liu and Huan Ye and Qiming Lv and Zhengguo Liang and Ao Wang and Dazhi Hou and Yang Gao and Shengchun Shen and Jing Tao and Liang Si and Wenbin Wu and Lingfei Wang},
journal= {arXiv preprint arXiv:2601.05462},
year = {2026}
}