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 D=1.65, while the high-field transition has a dimension 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.

Direct Observation of Fractal-Dimensional Percolation in the 3D Cluster Dynamics of a Ferroelectric Supercrystal / Falsi, L.; Aversa, M.; Di Mei, F.; Pierangeli, D.; Xin, F.; Agranat, A. J.; Delre, E.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 126:3(2021), p. 037601. [10.1103/PhysRevLett.126.037601]

Direct Observation of Fractal-Dimensional Percolation in the 3D Cluster Dynamics of a Ferroelectric Supercrystal

Falsi L.
;
Delre E.
2021

Abstract

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 D=1.65, while the high-field transition has a dimension 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.
perovskite, percolation, electric field
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Direct Observation of Fractal-Dimensional Percolation in the 3D Cluster Dynamics of a Ferroelectric Supercrystal / Falsi, L.; Aversa, M.; Di Mei, F.; Pierangeli, D.; Xin, F.; Agranat, A. J.; Delre, E.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 126:3(2021), p. 037601. [10.1103/PhysRevLett.126.037601]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1501746
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