Understanding the nature of sliding ferroelectricity is of fundamental importance for the discovery and application of two-dimensional ferroelectric materials. In this work, we investigate the phenomenon of switchable polarization in a bilayer MoS2 with a natural rhombohedral stacking, where the spontaneous polarization is coupled with excitonic effects through an asymmetric interlayer coupling. Using optical spectroscopy and imaging techniques, we observe how a released domain wall switches the polarization of a large single domain. Our results highlight the importance of domain walls in the polarization switching of non-twisted rhombohedral transition metal dichalcogenides and open new opportunities for the non-volatile control of their optical response.
@article{arxiv.2311.12126,
title = {Non-volatile electrical polarization switching via domain wall release in 3R-MoS$_2$ bilayer},
author = {Dongyang Yang and Jing Liang and Jingda Wu and Yunhuan Xiao and Jerry I. Dadap and Kenji Watanabe and Takashi Taniguchi and Ziliang Ye},
journal= {arXiv preprint arXiv:2311.12126},
year = {2023}
}