An ac electric field triggers a cascade from homogeneous oscillations to splay-twist stripes and then to a square lattice of +1/-1 defects in a ferroelectric nematic, via geometrical splay cancellation.
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Periodic splay Fr\'eedericksz transitions in a ferroelectric nematic
An ac electric field triggers a cascade from homogeneous oscillations to splay-twist stripes and then to a square lattice of +1/-1 defects in a ferroelectric nematic, via geometrical splay cancellation.