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arXiv · 2603.24102

Electron Dynamics Reconstruction and Nontrivial Transport by Acoustic Waves

Zi-Qian Zhou·Zhi-Fan Zhang·Cong Xiao·Hua Jiang·X. C. Xie
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Abstract

Surface acoustic waves (SAWs) become a popular driving source in modern condensed matter physics, but most existing theories simplify them as electric fields and ignore the non-uniform Brillouin zone folding effect. We develop a semiclassical framework and reconstruct the electron dynamics by treating SAW as a quasi-periodic potential modulating electronic momentum distribution. This framework naturally explains the experimentally observed DC drag current and predicts acousto-electric Hall effect. The theory further reveals various SAW-driven transport phenomena, emerging anomalous Hall, thermal Hall, and Nernst effects within time-reversal symmetric systems. Illustrated in bilayer graphene and $\mathrm{MX_2}$ (M = Mo, W; X = S, Se, Te), the angular-dependent acousto-electric Hall effect provides an experimental probe for Berry curvature distribution.

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Zi-Qian Zhou, Zhi-Fan Zhang, Cong Xiao, Hua Jiang, X. C. Xie. 2026-03-25. Electron Dynamics Reconstruction and Nontrivial Transport by Acoustic Waves. https://arxiv.org/abs/2603.24102

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