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Nahas Y, Prokhorenko S, Kornev I, et al. Emergent Berezinskii-Kosterlitz-Thouless Phase in Low-Dimensional Ferroelectrics. Phys Rev Lett. 2017;119(11):117601doi: 10.1103/PhysRevLett.119.117601.
Nahas, Y., Prokhorenko, S., Kornev, I., & Bellaiche, L. (2017). Emergent Berezinskii-Kosterlitz-Thouless Phase in Low-Dimensional Ferroelectrics. Physical review letters, 119(11), 117601. https://doi.org/10.1103/PhysRevLett.119.117601
Nahas, Y, et al. "Emergent Berezinskii-Kosterlitz-Thouless Phase in Low-Dimensional Ferroelectrics." Physical review letters vol. 119,11 (2017): 117601. doi: https://doi.org/10.1103/PhysRevLett.119.117601
Nahas Y, Prokhorenko S, Kornev I, Bellaiche L. Emergent Berezinskii-Kosterlitz-Thouless Phase in Low-Dimensional Ferroelectrics. Phys Rev Lett. 2017 Sep 15;119(11):117601. doi: 10.1103/PhysRevLett.119.117601. Epub 2017 Sep 12. PMID: 28949234.
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Phys Rev Lett. 2017 Sep 15;119(11):117601. doi: 10.1103/PhysRevLett.119.117601. Epub 2017 Sep 12.

Emergent Berezinskii-Kosterlitz-Thouless Phase in Low-Dimensional Ferroelectrics.

Physical review letters

Y Nahas, S Prokhorenko, I Kornev, L Bellaiche

Affiliations

  1. Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA.
  2. Theoretical Materials Physics, Q-MAT CESAM, Université de Liège, B-4000 Sart Tilman, Belgium.
  3. Laboratoire Structures, Propriétés et Modélisation des Solides, CentraleSupélec, 92290 Châtenay-Malabry, France.

PMID: 28949234 DOI: 10.1103/PhysRevLett.119.117601

Abstract

Using first-principles-based simulations merging an effective Hamiltonian scheme with scaling, symmetry, and topological arguments, we find that an overlooked Berezinskii-Kosterlitz-Thouless (BKT) phase sustained by quasicontinuous symmetry emerges between the ferroelectric phase and the paraelectric one of BaTiO_{3} ultrathin film, being under tensile strain. Not only do these results provide an extension of BKT physics to the field of ferroelectrics, but they also unveil their nontrivial critical behavior in low dimensions.

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