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 MoS2 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.
Cite
@article{arxiv.2309.13260,
title = {Phonon chirality manipulation mechanism in TMD interlayer-sliding ferroelectrics},
author = {Hao Chen and Qianqian Wang and Xukun Feng and Weikang Wu and Lifa Zhang},
journal= {arXiv preprint arXiv:2309.13260},
year = {2024}
}