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arXiv · 2501.11234

Nonlinear Hall effect driven by spin-charge-coupled motive force

Kohei Hattori·Hikaru Watanabe·Ryotaro Arita
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Abstract

Parity-time-reversal symmetric ($\mathcal{PT}$-symmetric) magnets have garnered much attention due to their spin-charge coupled dynamics enriched by the parity-symmetry breaking. By real-time simulations, we study how localized spin dynamics can affect the nonlinear Hall effect in $\mathcal{PT}$-symmetric magnets. To identify the leading-order term, we derive analytical expressions for the second-order optical response and classify the contributions by considering their transformation properties under $\mathcal{PT}$ symmetry. Notably, our results reveal that the sizable contribution is attributed to the mixed dipole effect, which is analogous to the Berry curvature dipole term.

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Kohei Hattori, Hikaru Watanabe, Ryotaro Arita. 2025-01-20. Nonlinear Hall effect driven by spin-charge-coupled motive force. https://doi.org/10.1103/physrevb.111.174416

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