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Sliding ferroelectricity and the moiré effect in Janus bilayer MoSSe.
- Source :
-
Nanoscale [Nanoscale] 2024 Feb 29; Vol. 16 (9), pp. 4841-4850. Date of Electronic Publication: 2024 Feb 29. - Publication Year :
- 2024
-
Abstract
- Two-dimensional van der Waals layered materials have attracted extensive attention in the field of low-dimensional ferroelectricity, on account of their readily delaminated structure and high-density information storage advantages. Here, we report the sliding ferroelectricity and moiré effects on the ferroelectricity in Janus bilayer MoSSe based on first-principles calculations. We focus on the changes of in-plane and out-of-plane polarizations due to sliding, and the calculations demonstrate that the in-plane and out-of-plane polarizations can be switched simultaneously by sliding. In addition, in moiré-twisted bilayer MoSSe, the complex stacking pattern and significant interlayer distance suppress the interlayer charge transfer, and the ferroelectric polarization is effectively suppressed. The polarization in the large-angle twisted structure is small but its direction can be adjusted by changing the twist angle. Our results emphasize the importance of low-dimensional ferroelectrics in van der Waals structures and pave a way for the search of sliding ferroelectric materials, as well as enriching the research on the ferroelectricity of large-angle twisted structures.
Details
- Language :
- English
- ISSN :
- 2040-3372
- Volume :
- 16
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- Nanoscale
- Publication Type :
- Academic Journal
- Accession number :
- 38314941
- Full Text :
- https://doi.org/10.1039/d3nr05730e