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- W2893743358 abstract "Although discussions of structural phase transitions in prototypical ferroelectric systems with the perovskite structure, such as ${mathrm{BaTiO}}_{3}$ and ${mathrm{PbTiO}}_{3}$, started almost seventy years ago, an atomic-level description of the polar characteristics as a function of temperature, pressure, and composition remains topical. Here we provide a novel quantitative description of the temperature-driven local structural correlations in ${mathrm{PbTiO}}_{3}$ via the development of characteristic relative cationic shifts. The results give new insights into the phase transition beyond those reliant on the long-range order. The ferroelectric-to-paraelectric transition of ${mathrm{PbTiO}}_{3}$ is realized by the extent of a stochastic polarization instability driven by a progressive misalignment instead of a complete disappearance of the local dipoles, which further suggests that such polarization instability is chemically induced at the morphotropic phase boundary of ${mathrm{PbTiO}}_{3}$-based solid solutions with giant piezoelectric effect. As such, our results not only identify the evolving atomistic disorder in a perovskite-based ferroelectric system, but also suggest that polarization instability can serve as a generic fingerprint for phase transitions as well as for better understanding structure-property relationships in ${mathrm{PbTiO}}_{3}$-based ferroelectric solid solutions." @default.
- W2893743358 created "2018-10-05" @default.
- W2893743358 creator A5037312038 @default.
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- W2893743358 date "2018-09-28" @default.
- W2893743358 modified "2023-10-17" @default.
- W2893743358 title "Stochastic Polarization Instability in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi>PbTiO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>" @default.
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- W2893743358 doi "https://doi.org/10.1103/physrevlett.121.137602" @default.
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- W2893743358 hasPublicationYear "2018" @default.
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