In-plane anomalous Hall effect in a low-dimensional system.

An unconventional in-plane anomalous Hall effect is observed in a low-dimensional heterostructure where a single preserved mirror plane allows Hall response to depend on both in-plane and out-of-plane magnetization components.

• Why it matters: Conventional anomalous Hall responses in magnetic systems are symmetry-limited to scale with the out-of-plane magnetization, leaving room to engineer Hall effects with different magnetization dependencies.
• What they did: A low-symmetry topological semimetal was interfaced with a ferromagnetic insulator to create reduced symmetry, and gate-tunable AHE was measured across multiple devices. A minimal symmetry-constrained microscopic model attributes the multidirectional response to interfacial spin-orbit coupling and exchange interaction.
• The result: The gate-tunable, multidirectional AHE implies symmetry-driven control of Hall mechanisms in low-dimensional quantum materials, enabling engineered, tunable Hall responses.

AI summary of the abstract · may contain errors · not medical advice · read the paper.