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首页> 外文期刊>Materials Research Letters >Geometry confined polar vertex domains in self-assembled BiFeO3 nano-islands
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Geometry confined polar vertex domains in self-assembled BiFeO3 nano-islands

机译：自组装BiFeO3纳米岛中的几何约束极顶点域

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摘要

Low-dimensional ferroelectric topological textures show abundant configurations such as flux-closure quadrants and vortices, suggesting potential applications in nano-electronic devices. However, the deterministic control of those polar textures is still challenging. By using piezoresponse force microscopy, threefold or fourfold vertex domain structures were observed in self-assembled BiFeO_(3) nano-islands, and the formation of such polar topological textures is strongly dependent on the size and shape of the nano-island. Furthermore, the vertex domain textures confined by geometry can be reversibly switched back and forth by external electric field, which are stabilized by the competition between elastic energy and electrostatic energy.
机译：低维铁电拓扑纹理显示出丰富的配置，例如通量封闭象限和涡流，表明在纳米电子器件中的潜在应用。但是，对这些极性纹理的确定性控制仍然具有挑战性。通过使用压电响应力显微镜，在自组装的BiFeO_（3）纳米岛中观察到三倍或四倍的顶点域结构，并且这种极性拓扑纹理的形成强烈依赖于纳米岛的大小和形状。此外，由几何形状限制的顶点域纹理可以通过外部电场可逆地来回切换，外部电场通过弹性能和静电能之间的竞争得以稳定。

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