Emergence of non-trivial polar topologies hidden in singular stress field in SrTiO3: topological strain-field engineering
文献类型：期刊论文
| 作者 | Shimada, Takahiro; Wang, Yu; Hamaguchi, Takayuki; Kasai, Kohta; Masuda, Kairi; Le Van Lich; Xu, Tao; Wang, Jie; Hirakata, Hiroyuki |
| 刊名 | JOURNAL OF PHYSICS-CONDENSED MATTER
 |
| 出版日期 | 2021 |
| 卷号 | 33期号:50 |
| 关键词 | POLARIZATION DYNAMICS |
| 英文摘要 | Discovery of non-trivial topological structures in condensed matters holds promise in novel technological paradigms. In contrast to ferromagnetics, where a variety of topological structures such as vortex, meron, and skyrmion have been discovered, only few topological structures can exist in ferroelectrics due to the lack of non-collinear interaction like the Dzyaloshinskii-Moriya interaction in ferromagnetics. Here, we demonstrate that polarization structures with a wide range of topological numbers (winding number n from -3 to +1) can be mechanically excited and designed by the mode-I singular stress field formed near the crack-tip in incipient ferroelectric SrTiO3. Our phase-field simulations based on Ginzburg-Landau theory successfully reveals that the near-tip polar topology is driven by the flexoelectric coupling with intense strain gradient at the tip, while a variety of the far-field topological structures is triggered by a collaboration between the electrostrictive and flexoelectric effects. The strain (gradient) field analysis further shows that the unexpected topological characters are implied in the singular stress field, which develops a variety of polar topologies near the crack tip. Therefore, our work provides a novel insight into the unusual interplay between mechanical- and ferroelectric-topologies, i.e. 'topological strain-field engineering', which paves the way to the mechanical design of functional topologies in the matter. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21259]  |
| 专题 | 2021专题_期刊论文 |
| 作者单位 | 1.Shimada, T 2.Wang, Y (corresponding author), Kyoto Univ, Dept Mech Engn & Sci, Nishikyo Ku, Kyoto 6158540, Japan. |
| 推荐引用方式 GB/T 7714 | Shimada, Takahiro,Wang, Yu,Hamaguchi, Takayuki,et al. Emergence of non-trivial polar topologies hidden in singular stress field in SrTiO3: topological strain-field engineering[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2021,33(50). |
| APA | Shimada, Takahiro.,Wang, Yu.,Hamaguchi, Takayuki.,Kasai, Kohta.,Masuda, Kairi.,...&Hirakata, Hiroyuki.(2021).Emergence of non-trivial polar topologies hidden in singular stress field in SrTiO3: topological strain-field engineering.JOURNAL OF PHYSICS-CONDENSED MATTER,33(50). |
| MLA | Shimada, Takahiro,et al."Emergence of non-trivial polar topologies hidden in singular stress field in SrTiO3: topological strain-field engineering".JOURNAL OF PHYSICS-CONDENSED MATTER 33.50(2021). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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