Non-volatile electrical polarization switching via domain wall release in 3R-MoS2 bilayer

Dongyang Yang, Jing Liang, Jingda Wu, Yunhuan Xiao, Jerry I. Dadap, Kenji Watanabe, Takashi Taniguchi and Ziliang Ye ()
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Dongyang Yang: The University of British Columbia
Jing Liang: The University of British Columbia
Jingda Wu: The University of British Columbia
Yunhuan Xiao: The University of British Columbia
Jerry I. Dadap: The University of British Columbia
Kenji Watanabe: National Institute for Materials Science
Takashi Taniguchi: National Institute for Materials Science
Ziliang Ye: The University of British Columbia

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract 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 natural rhombohedral stacking, where the spontaneous polarization is coupled with excitonic effects through 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.

Date: 2024
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DOI: 10.1038/s41467-024-45709-x

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