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arXiv · 2309.13260

Phonon chirality manipulation mechanism in TMD interlayer-sliding ferroelectrics

Hao Chen·Qianqian Wang·Xukun Feng·Weikang Wu·Lifa Zhang
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Abstract

As an ideal platform, both the theoretical prediction and first experimental verification of chiral phonons are based on transition-metal dichalcogenide materials. The manipulation of phonon chirality in these materials will have a profound impact on the study of chiral phonons. In this work, we utilize the sliding ferroelectric mechanism to study the phonon chirality manipulation mechanism in transition-metal dichalcogenide materials. Based on first-principles calculations, we study the different effects of interlayer sliding on the phonon properties in bilayer and four-layer MoS$_2$ sliding ferroelectrics. We find that sliding can regulate phonon chirality and Berry curvature, which further affects the phonon angular momentum and magnetization under 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 manipulate phonon chirality in transition-metal dichalcogenide materials through the sliding ferroelectric mechanism.

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Hao Chen, Qianqian Wang, Xukun Feng, Weikang Wu, Lifa Zhang. 2023-09-23. Phonon chirality manipulation mechanism in TMD interlayer-sliding ferroelectrics. https://doi.org/10.1021/acs.nanolett.3c03787

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