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arXiv · 2608.24023

Scattering-Induced Magnon Layer-Hall Transport beyond Band Geometry

Zhiping Xue·Zhoujian Sun·Xiyin Ye·Lei Zhang·Tao Yu
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Abstract

The layer Hall effect has been exclusively attributed to layer-locked Berry curvature, posing a fundamental barrier to its realization in conventional magnets. Here we report a fundamentally distinct layer Hall effect for bosonic excitations, i.e., magnons, which originates solely from non-reciprocal dipolar scattering at heterointerfaces, thereby decoupling the phenomenon from geometric-phase mechanisms. Using a microscopic scattering theory, we demonstrate that a longitudinal temperature gradient drives opposite transverse thermal Hall currents in a nanowire atop a magnetic film, with the direction fully reconfigurable by the applied magnetic field. The effect yields a significant Hall angle of $\sim 6^{\circ}$ in conventional magnetic heterostructures, eliminating the need for topological engineering. Our findings establish a scattering-driven paradigm for layer Hall effect, extendable to ferrons and polar phonons, and predict a Hall response that is readily detectable in conventional magnetic heterostructures.

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Zhiping Xue, Zhoujian Sun, Xiyin Ye, Lei Zhang, Tao Yu. 2026-08-25. Scattering-Induced Magnon Layer-Hall Transport beyond Band Geometry. https://arxiv.org/abs/2608.24023

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