Thickness dependence of domain size in 2D ferroelectric CuInP2S6 nanoflakes
Two-dimensional (2D) ferroelectrics refer to those ferroelectrics with layered structure and weak interlayer interactions (e.g., van de Waals interlayer coupling). A number of basic physical issues in the framework of ferroelectricity deserve clarifications, and one of them is the size effect regard...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2019-11-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5123366 |
| _version_ | 1818112843319345152 |
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| author | Liufang Chen Yongqiang Li Chuanfu Li Hanwen Wang Zheng Han He Ma Guoliang Yuan Lin Lin Zhibo Yan Xiangping Jiang Jun-Ming Liu |
| author_facet | Liufang Chen Yongqiang Li Chuanfu Li Hanwen Wang Zheng Han He Ma Guoliang Yuan Lin Lin Zhibo Yan Xiangping Jiang Jun-Ming Liu |
| author_sort | Liufang Chen |
| collection | DOAJ |
| description | Two-dimensional (2D) ferroelectrics refer to those ferroelectrics with layered structure and weak interlayer interactions (e.g., van de Waals interlayer coupling). A number of basic physical issues in the framework of ferroelectricity deserve clarifications, and one of them is the size effect regarding the dependence of ferroelectricity on material thickness. In this work, we investigate the ferroelectric domain structures of 2D ferroelectric CuInP2S6 nanoflakes attached on heavily doped Si wafers and polarization switching using the piezoresponse force microscopy. While the domain structure shows highly irregular morphology and 180° domain walls, the statistics on domain size (diameter) W and nanoflake thickness d demonstrates the remarkable thickness dependence of domain size, illustrated by the shrinking domain size from 630 nm to 75 nm with decreasing thickness d from ∼130 nm to ∼11 nm. This dependence fits the Landau-Lifshitz-Kittel (LLK) scaling law with the scaling exponent of ∼0.65, slightly larger than 0.5 for 3D ferroelectrics. It is suggested that the size effect in terms of the LLK scaling law does not show an essential difference between the 2D and 3D ferroelectric systems. |
| first_indexed | 2024-12-11T03:25:22Z |
| format | Article |
| id | doaj.art-71e7ef90782146418990c1d36c5a67f3 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-11T03:25:22Z |
| publishDate | 2019-11-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-71e7ef90782146418990c1d36c5a67f32022-12-22T01:22:32ZengAIP Publishing LLCAIP Advances2158-32262019-11-01911115211115211-610.1063/1.5123366Thickness dependence of domain size in 2D ferroelectric CuInP2S6 nanoflakesLiufang Chen0Yongqiang Li1Chuanfu Li2Hanwen Wang3Zheng Han4He Ma5Guoliang Yuan6Lin Lin7Zhibo Yan8Xiangping Jiang9Jun-Ming Liu10Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, ChinaLaboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, ChinaLaboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaLaboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, ChinaLaboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, ChinaSchool of Materials Sciences and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, ChinaLaboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, ChinaTwo-dimensional (2D) ferroelectrics refer to those ferroelectrics with layered structure and weak interlayer interactions (e.g., van de Waals interlayer coupling). A number of basic physical issues in the framework of ferroelectricity deserve clarifications, and one of them is the size effect regarding the dependence of ferroelectricity on material thickness. In this work, we investigate the ferroelectric domain structures of 2D ferroelectric CuInP2S6 nanoflakes attached on heavily doped Si wafers and polarization switching using the piezoresponse force microscopy. While the domain structure shows highly irregular morphology and 180° domain walls, the statistics on domain size (diameter) W and nanoflake thickness d demonstrates the remarkable thickness dependence of domain size, illustrated by the shrinking domain size from 630 nm to 75 nm with decreasing thickness d from ∼130 nm to ∼11 nm. This dependence fits the Landau-Lifshitz-Kittel (LLK) scaling law with the scaling exponent of ∼0.65, slightly larger than 0.5 for 3D ferroelectrics. It is suggested that the size effect in terms of the LLK scaling law does not show an essential difference between the 2D and 3D ferroelectric systems.http://dx.doi.org/10.1063/1.5123366 |
| spellingShingle | Liufang Chen Yongqiang Li Chuanfu Li Hanwen Wang Zheng Han He Ma Guoliang Yuan Lin Lin Zhibo Yan Xiangping Jiang Jun-Ming Liu Thickness dependence of domain size in 2D ferroelectric CuInP2S6 nanoflakes AIP Advances |
| title | Thickness dependence of domain size in 2D ferroelectric CuInP2S6 nanoflakes |
| title_full | Thickness dependence of domain size in 2D ferroelectric CuInP2S6 nanoflakes |
| title_fullStr | Thickness dependence of domain size in 2D ferroelectric CuInP2S6 nanoflakes |
| title_full_unstemmed | Thickness dependence of domain size in 2D ferroelectric CuInP2S6 nanoflakes |
| title_short | Thickness dependence of domain size in 2D ferroelectric CuInP2S6 nanoflakes |
| title_sort | thickness dependence of domain size in 2d ferroelectric cuinp2s6 nanoflakes |
| url | http://dx.doi.org/10.1063/1.5123366 |
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