Ising lines: natural topological defects within ferroelectric Bloch walls

0449562 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
Stepkova, Vilgelmina - Márton, Pavel - Hlinka, Jiří
Ising lines: natural topological defects within ferroelectric Bloch walls.
Physical Review. B. Roč. 92, č. 9 (2015), "094106-1"-"094106-5". ISSN 1098-0121
Grant CEP: GA ČR GA15-04121S
Institucionální podpora: RVO:68378271
Klíčová slova: ferroelectrics * Ginzburg-Landau-Devonshire model * domain structure * topological defects
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.736, rok: 2014

Phase-field simulations demonstrate that the polarization order-parameter field in the Ginzburg-Landau-Devonshire model of rhombohedral ferroelectric BaTiO3 allows for an interesting linear defect, stable under simple periodic boundary conditions. This linear defect, here called the Ising line, can be described as an about 2-nm-thick intrinsic paraelectric nanorod acting as a highly mobile borderline between finite portions of Bloch-like domain walls of opposite helicity. These Ising lines play the role of domain boundaries associated with the Ising-to-Bloch domain-wall phase transition.
Trvalý link: http://hdl.handle.net/11104/0251087