论文标题
铁电 - 抗分层甲状腺素的明亮域壁的现象学描述
Phenomenological description of bright domain walls in ferroelectric-antiferroelectric layered chalcogenides
论文作者
论文摘要
最近，显示出层次的铁电Cuinp2Se6表现出具有局部增强的压电响应的结构域壁 - 与大多数铁电的名义上零压电响应的观察结果显着。尽管有人提出这种“明亮”的域壁是材料的铁 - 和防抗菌有序区域之间的相位构造，但这些边界的存在和响应背后的物理机制仍有待理解。 Here, using Landau-Ginzburg-Devonshire phenomenology combined with four sub-lattices model, we describe quantitatively the bright-contrast and dark-contrast domain boundaries between the antiferroelectric, ferroelectric or ferrielectric long-range ordered phases in a layered ferroelectric-antiferroelectric ferroics, such as CuInP2(S1-ySey)6
Recently, a layered ferroelectric CuInP2Se6 was shown to exhibit domain walls with locally enhanced piezoresponse - a striking departure from the observations of nominally zero piezoresponse in most ferroelectrics. Although it was proposed that such "bright" domain walls are phase-boundaries between ferri- and antiferroelectrically ordered regions of the materials, the physical mechanisms behind the existence and response of these boundaries remain to be understood. Here, using Landau-Ginzburg-Devonshire phenomenology combined with four sub-lattices model, we describe quantitatively the bright-contrast and dark-contrast domain boundaries between the antiferroelectric, ferroelectric or ferrielectric long-range ordered phases in a layered ferroelectric-antiferroelectric ferroics, such as CuInP2(S1-ySey)6
