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Two-dimensional ferroelectrics and homogeneous switching. On the 75th anniversary of the Landau—Ginzburg theory of ferroelectricity

 a,  b
a Institute of Mathematical Problems of Biology, Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, Prof. Vitkevich str. 1, Pushchino, Moscow Region, 142290, Russian Federation
b Federal Scientific Research Center "Crystallography and Photonics", Russian Academy of Sciences, Leninskii prosp 59, Moscow, 119333, Russian Federation

Within the framework of the Landau—Ginzburg (LG) theory, the kinetics of polarization switching in ferroelectric crystals and the transition from domain switching to homogeneous switching in nanosized single-crystal films are considered. It is shown that homogeneous (nondomain) switching can be described in LG theory terms only for two-dimensional ferroelectrics. A review of the experimental results for two-dimensional films of a ferroelectric polymer and barium titanate is given. For ultrathin polymer films, these results are also confirmed by first principles calculations.

Fulltext pdf (626 KB)
Fulltext is also available at DOI: 10.3367/UFNe.2020.09.038841
Keywords: ferroelectricity, Landau—Ginzburg—Devonshire theory, domains, two-dimensional ferroelectrics, homogeneous switching
PACS: 77.55.−g, 77.80.Dj, 77.84.Cg (all)
DOI: 10.3367/UFNe.2020.09.038841
URL: https://ufn.ru/en/articles/2020/11/e/
000613920600005
2-s2.0-85101587644
2020PhyU...63.1140B
Citation: Bystrov V S, Fridkin V M "Two-dimensional ferroelectrics and homogeneous switching. On the 75th anniversary of the Landau—Ginzburg theory of ferroelectricity" Phys. Usp. 63 1140–1147 (2020)
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Received: 13th, March 2020, revised: 11th, August 2020, 23rd, September 2020

Оригинал: Быстров В С, Фридкин В М «Двумерные сегнетоэлектрики и однородное переключение. К 75-летию теории сегнетоэлектричества Ландау—Гинзбурга» УФН 190 1217–1224 (2020); DOI: 10.3367/UFNr.2020.09.038841

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