Sliding induced multiple polarization states in two-dimensional ferroelectrics

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Sliding induced multiple polarization states in two-dimensional ferroelectrics
Title:
Sliding induced multiple polarization states in two-dimensional ferroelectrics
Journal Title:
Nature Communications
Publication Date:
13 December 2022
Citation:
Meng, P., Wu, Y., Bian, R., Pan, E., Dong, B., Zhao, X., Chen, J., Wu, L., Sun, Y., Fu, Q., Liu, Q., Shi, D., Zhang, Q., Zhang, Y.-W., Liu, Z., & Liu, F. (2022). Sliding induced multiple polarization states in two-dimensional ferroelectrics. Nature Communications, 13(1). https://doi.org/10.1038/s41467-022-35339-6
Abstract:
AbstractWhen the atomic layers in a non-centrosymmetric van der Waals structure slide against each other, the interfacial charge transfer results in a reversal of the structure’s spontaneous polarization. This phenomenon is known as sliding ferroelectricity and it is markedly different from conventional ferroelectric switching mechanisms relying on ion displacement. Here, we present layer dependence as a new dimension to control sliding ferroelectricity. By fabricating 3 R MoS2 of various thicknesses into dual-gate field-effect transistors, we obtain anomalous intermediate polarization states in multilayer (more than bilayer) 3 R MoS2. Using results from ab initio density functional theory calculations, we propose a generalized model to describe the ferroelectric switching process in multilayer 3 R MoS2 and to explain the formation of these intermediate polarization states. This work reveals the critical roles layer number and interlayer dipole coupling play in sliding ferroelectricity and presents a new strategy for the design of novel sliding ferroelectric devices.
License type:
Attribution 4.0 International (CC BY 4.0)
Funding Info:
This research / project is supported by the A*STAR - AME Individual Research Grants (IRG)
Grant Reference no. : A2083c0052

This research / project is supported by the National Research Foundation - Competitive Research Programme
Grant Reference no. : NRF-CRP24-2020-0002

This research / project is supported by the National Research Foundation - Competitive Research Programme
Grant Reference no. : CRP22-2019-0007

This research / project is supported by the National Research Foundation - Competitive Research Programme
Grant Reference no. : CRP22-2019-0004

This research / project is supported by the Ministry of Education - Research Centre of Excellence
Grant Reference no. : NA
Description:
ISSN:
2041-1723
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