We perform percolation analysis of crossed-polarizer transmission images in a biased nanodisordered bulk KTN:Li perovskite. Two distinct percolative transitions are identified at two electric field thresholds. The low-field transition involves a directional fractal chain of dimension $\mathcal{D}=1.65$, while the high-field transition has a dimension $\mathcal{D}>2$. Direct cluster imaging in the volume is achieved using high-resolution orthographic 3D projections based on giant refraction. Percolation is attributed to a full-3D domain reorientation that mediates the transition from a ferroelectric supercrystal state to a disordered domain mosaic.

中文翻译：

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在铁电超晶3D团簇动力学中分形维数渗滤的直接观察

我们在有偏斜的纳米无序本体KTN：Li钙钛矿中执行正交偏振透射图像的渗滤分析。在两个电场阈值处识别出两个不同的渗透转变。低场跃迁涉及尺寸方向的分形链$\mathcal{d}=1.65$，而高场过渡具有一个维度 $\mathcal{d}>2$。使用基于巨折射的高分辨率正交3D投影可实现体积中的直接群集成像。渗流归因于全3D域重新定向，该方向介导了从铁电超晶态到无序域镶嵌的过渡。