Evidence of 3D Topological-Domain Dynamics in KTN:Li Polarization-Supercrystal Formation

Feifei Xin*, Ludovica Falsi, Yehonatan Gelkop, Davide Pierangeli, Guoquan Zhang, Fang Bo, Fabrizio Fusella, Aharon J. Agranat, Eugenio Delre

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We experimentally and theoretically investigate thermal domain evolution in near-transition KTN:Li. Results allow us to establish how polarization supercrystals form, a hidden 3D topological phase composed of hypervortex defects. These are the result of six converging polarization vortices, each associated to one orientation of the 3D broken inversion symmetry. We also identify rescaling soliton lattices and domain patterns that replicate on different scales. Findings shed light on volume domain self-organization into closed-flux patterns and open up new scenarios for topologically protected noise-resistant ferroelectric memory bits.

Original languageAmerican English
Article number066603
JournalPhysical Review Letters
Issue number6
StatePublished - 9 Feb 2024

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