Distinguishing and Separating In-Plane Hall Responses
Soumya Sankar, Xingkai Cheng, Junwei Liu, Berthold Jäck
TLDR
A new framework disentangles complex in-plane Hall responses in topological materials by leveraging distinct field symmetries and angular dependencies.
Key contributions
- Introduces a universal framework to separate in-plane Hall effect contributions.
- Utilizes distinct field-reversal symmetries and angular dependencies for disentanglement.
- Demonstrated with a 12-terminal Hall bar on the ferromagnetic Weyl semimetal Fe3Sn.
- Provides a standardized approach for future studies of in-plane Hall responses.
Why it matters
Understanding in-plane Hall effects is crucial for topological materials and magnetic sensing. This work resolves long-standing ambiguities in measurements, providing a clear path for future research and applications in this field.
Original Abstract
Electric Hall effects generated by an in-plane magnetic field have recently gained attention owing to their intrinsic origin in topological electronic states and potential application in magnetic field sensing. In pratice, the measured transverse electric voltage typically combines contributions from multiple phenomena, such as anisotropy and Berry curvature effects, leading to interpretative ambiguities of the measurement signal. Here, we introduce a universal framework that disentangles these contributions via their distinct field-reversal symmetries and angular dependencies. Leveraging a 12-terminal Hall bar for independent control of the electric and in-plane magnetic field directions, we exemplify this method by analyzing the transverse electric voltage recorded on the the ferromagnetic Weyl semimetal Fe3Sn in an in-plane geometry. The standardized approach presented in this work will guide future studies of in-plane Hall responses in magnetic and topological materials.
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