In-Plane Sliding Ferroelectricity Realized in Penta-PdSe<sub>2</sub>/Penta-PtSe<sub>2</sub> van der Waals Heterostructure

Hou, Changsheng; Shen, Yiheng; Wang, Qian; Yoshikawa, Akira; Kawazoe, Yoshiyuki; Jena, Puru

doi:10.1021/acsnano.4c02994

ACS Nano

2024

DOI: 10.1021/acsnano.4c02994

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In-Plane Sliding Ferroelectricity Realized in Penta-PdSe₂/Penta-PtSe₂ van der Waals Heterostructure

Changsheng Hou,

Yiheng Shen,

Qian Wang

et al.

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Degradation of Sliding Ferroelectricity Induced by Environmental Gas Molecules: Case of Bilayer WS₂

Pan,

Sun,

Niu

et al. 2024

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Emerging sliding ferroelectricity (SF) holds great potential for the development of low‐energy‐cost and high‐endurance ferroelectric devices. In the van der Waals (vdWs) stacking of SF, atomic vacancies inevitably exist and gas molecules commonly stay in the interlayer, but their impact on SF is unclear. In this work, the bilayer WS2 is taken as an example and demonstrate their effect on the SF polarization and switching barrier. The sulfur vacancy (SV) is found to slightly impair polarization, but the W atoms around the SV tend to chemically adsorb O2 molecules in the vdWs gap, which can possibly further dissociate into separately chemisorbed O atoms at room temperature. The adsorbed oxygen causes the reduction of polarization and switching barrier, eventually inducing the degradation of SF properties. In addition, the adsorbed oxygen also modifies the Schottky barriers in SF‐based transistors and narrows the memory window, leading to the degradation of the devices. These effects may accumulate over time and eventually result in degraded device performance. This work provides a microscopic insight into the effect of defects/impurities on SF, favoring optimizing the performance of SF‐based devices.

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Degradation of Sliding Ferroelectricity Induced by Environmental Gas Molecules: Case of Bilayer WS₂

Pan,

Sun,

Niu

et al. 2024

Small

View full text Add to dashboard Cite

show abstract

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In-Plane Sliding Ferroelectricity Realized in Penta-PdSe₂/Penta-PtSe₂ van der Waals Heterostructure

Cited by 1 publication

References 66 publications

Degradation of Sliding Ferroelectricity Induced by Environmental Gas Molecules: Case of Bilayer WS₂

Degradation of Sliding Ferroelectricity Induced by Environmental Gas Molecules: Case of Bilayer WS₂

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In-Plane Sliding Ferroelectricity Realized in Penta-PdSe2/Penta-PtSe2 van der Waals Heterostructure

Cited by 1 publication

References 66 publications

Degradation of Sliding Ferroelectricity Induced by Environmental Gas Molecules: Case of Bilayer WS2

Degradation of Sliding Ferroelectricity Induced by Environmental Gas Molecules: Case of Bilayer WS2

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Product

Resources

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In-Plane Sliding Ferroelectricity Realized in Penta-PdSe₂/Penta-PtSe₂ van der Waals Heterostructure

Degradation of Sliding Ferroelectricity Induced by Environmental Gas Molecules: Case of Bilayer WS₂

Degradation of Sliding Ferroelectricity Induced by Environmental Gas Molecules: Case of Bilayer WS₂