Article (Scientific journals)
Emergent Berezinskii-Kosterlitz-Thouless Phase in Low-Dimensional Ferroelectrics
Nahas, Yousra; Prokhorenko, Sergei; Kornev, I. et al.
2017In Physical Review Letters, 119 (11)
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Keywords :
Barium titanate; Thin films; Tensile strain; Ultrathin films; Critical behavior; Effective Hamiltonian; Ferroelectric phase; First principles; Kosterlitz-Thouless; Low dimensional; Paraelectrics; Ferroelectric materials
Abstract :
[en] 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 BaTiO3 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. © 2017 American Physical Society.
Disciplines :
Physics
Author, co-author :
Nahas, Yousra ;  Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Prokhorenko, Sergei ;  Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Kornev, I.;  Laboratoire Structures, Propriétés et Modélisation des Solides, CentraleSupélec, Châtenay-Malabry, France
Bellaiche, L.;  Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, AK, United States
Language :
English
Title :
Emergent Berezinskii-Kosterlitz-Thouless Phase in Low-Dimensional Ferroelectrics
Publication date :
2017
Journal title :
Physical Review Letters
ISSN :
0031-9007
eISSN :
1079-7114
Publisher :
American Physical Society
Volume :
119
Issue :
11
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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