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Ferroelectricity and Phase Transitions in Monolayer Group-IV Monochalcogenides
Open accessAbstract
Ferroelectricity usually fades away as materials are thinned down below a critical value. We reveal that the unique ionic-potential anharmonicity can induce spontaneous in-plane electrical polarization and ferroelectricity in monolayer group-IV monochalcogenides MX (M=Ge, Sn; X=S, Se). An effective Hamiltonian has been successfully extracted from the parametrized energy space, making it possible to study the ferroelectric phase transitions in a single-atom layer. The ferroelectricity in these materials is found to be robust and the corresponding Curie temperatures are higher than room temperature, making them promising for realizing ultrathin ferroelectric devices of broad interest. We further provide the phase diagram and predict other potentially two-dimensional ferroelectric materials.
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Cites
Generalized Gradient Approximation Made Simple
Perdew, J. P., Burke, K., & Ernzerhof, M. (1996) · Physical Review Letters · doi:10.1103/physrevlett.77.3865 · Cited by 215,824
From ultrasoft pseudopotentials to the projector augmented-wave method
Kresse, G., & Joubert, D. (1999) · Physical Review B · doi:10.1103/physrevb.59.1758 · Cited by 85,307
Cited by
Out-of-Plane Piezoelectricity and Ferroelectricity in Layered α-In2Se3 Nanoflakes
Zhou, Y., Wu, D., Zhu, Y., Cho, Y., He, Q., Yang, X., Herrera, K., Chu, Z., Han, Y., Downer, M. C., et al. (2017) · Nano Letters · doi:10.1021/acs.nanolett.7b02198 · Cited by 936
Cui, C., Hu, W.-J., Yan, X., Addiego, C., Gao, W., Wang, Y., Wang, Z., Li, L., Cheng, Y., Li, P., et al. (2018) · Nano Letters · doi:10.1021/acs.nanolett.7b04852 · Cited by 834
Xue, F., Hu, W., Lee, K., Lu, L., Zhang, J., Tang, H., Han, A., Hsu, W., Tu, S., Chang, W., et al. (2018) · Advanced Functional Materials · doi:10.1002/adfm.201803738 · Cited by 409
Recent Progress in Two‐Dimensional Ferroelectric Materials
Guan, Z., Hu, H., Shen, X., Xiang, P., Zhong, N., Chu, J., & Duan, C. (2020) · Advanced Electronic Materials · doi:10.1002/aelm.201900818 · Cited by 409
Emerging in‐plane anisotropic two‐dimensional materials
Li, L., Han, W., Pi, L., Niu, P., Han, J., Wang, C., Su, B., Li, H., Xiong, J., Bando, Y., et al. (2019) · InfoMat · doi:10.1002/inf2.12005 · Cited by 382
Metadata
- Authors
- Fei, R., Kang, W., & Yang, L.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2016-08-23
- Volume
- 117
- Issue
- 9
- Pages
- 097601-097601
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2340037079
- Cited by
- 673
- References
- 2
- FWCI
- 21.54
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Fei, R., Kang, W., & Yang, L. (2016). Ferroelectricity and Phase Transitions in Monolayer Group-IV Monochalcogenides. Physical Review Letters. https://doi.org/10.1103/physrevlett.117.097601
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