Symmetry-engineered and electrically tunable in-plane anomalous Hall effect in oxide heterostructures

Kunjie Dai; Zhen Wang; Wenfeng Wu; Feng Jin; Enda Hua; Nan Liu; Jingdi Lu; Jinfeng Zhang; Yuyue Zhao; Linda Yang; Kai Liu; Huan Ye; Qiming Lv; Zhengguo Liang; Ao Wang; Dazhi Hou; Yang Gao; Shengchun Shen; Jing Tao; Liang Si; Wenbin Wu; Lingfei Wang

arXiv · 2601.05462

Symmetry-engineered and electrically tunable in-plane anomalous Hall effect in oxide heterostructures

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Abstract

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.

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Kunjie Dai, Zhen Wang, Wenfeng Wu, Feng Jin, Enda Hua, Nan Liu, Jingdi Lu, Jinfeng Zhang, Yuyue Zhao, Linda Yang, Kai Liu, Huan Ye, Qiming Lv, Zhengguo Liang, Ao Wang, Dazhi Hou, Yang Gao, Shengchun Shen, Jing Tao, Liang Si, Wenbin Wu, Lingfei Wang. 2026-01-09. Symmetry-engineered and electrically tunable in-plane anomalous Hall effect in oxide heterostructures. https://arxiv.org/abs/2601.05462

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