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As an ideal platform, both the theoretical prediction and first experimentalverification of chiral phonons are based on transition-metal dichalcogenidematerials. The manipulation of phonon chirality in these materials will have aprofound impact on the study of chiral phonons. In this work, we utilize thesliding ferroelectric mechanism to study the phonon chirality manipulationmechanism in transition-metal dichalcogenide materials. Based onfirst-principles calculations, we study the different effects of interlayersliding on the phonon properties in bilayer and four-layer MoS$_2$ slidingferroelectrics. We find that sliding can regulate phonon chirality and Berrycurvature, which further affects the phonon angular momentum and magnetizationunder a temperature gradient and the phonon Hall effect under a magnetic field.Our work connects two emerging fields and opens up a new route to manipulatephonon chirality in transition-metal dichalcogenide materials through thesliding ferroelectric mechanism.

Phonon chirality manipulation mechanism in TMD interlayer-sliding ferroelectrics