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Dynamics of polar vortex crystallization

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arxiv 2302.07380 v1 pith:DDVSTRIA submitted 2023-02-14 cond-mat.mtrl-sci

Dynamics of polar vortex crystallization

Suyash Rijal , Yousra Nahas , Sergei Prokhorenko , Laurent Bellaiche This is my paper
classification cond-mat.mtrl-sci
keywords vortexpolarcrystallizationultra-thinac-fieldbridgesclearcommonly
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Vortex crystals are commonly observed in ultra-thin ferroelectrics. However, a clear physical picture of origin of this topological state is currently lacking. Here, we show that vortex crystallization in ultra-thin Pb(Zr0.4,Ti0.6)O3 films stems from the softening of a phonon mode and can be thus described as a SU(2) symmetry-breaking transition. This result sheds light on the topology of the polar vortex patterns and bridges polar vortices with smectic phases, spin spirals, and other modulated states. Finally, we predict an ac-field driven resonant switching of the vortex tube orientation which could enable new low-power electronic technologies.

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