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arXiv · 1108.0019

Interfacial Polarization and Pyroelectricity in Antiferrodistortive Structures Induced by a Flexoelectric Effect and Rotostriction

Anna N. Morozovska·Eugene A. Eliseev·Maya D. Glinchuk·Long-Qing Chen·Venkatraman Gopalan
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Abstract

Theoretical analysis based on the Landau-Ginzburg-Devonshire (LGD) theory is used to show that the product effect of flexoelectricity and rotostriction can lead to a spontaneous polarization in the vicinity of antiphase boundaries, ferroelastic twin walls, surfaces and interfaces in the octahedrally tilted phase of otherwise non-ferroelectric perovskites such as CaTiO3, SrTiO3, and EuTiO3. As an example, we numerically demonstrate a large spontaneous polarization on the order of 1-5muC/cm2 at the SrTiO3 antidistortive phase boundaries at temperatures lower than the antiferrodistortive structural phase transition temperature of ~105 K

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Anna N. Morozovska, Eugene A. Eliseev, Maya D. Glinchuk, Long-Qing Chen, Venkatraman Gopalan. 2011-10-24. Interfacial Polarization and Pyroelectricity in Antiferrodistortive Structures Induced by a Flexoelectric Effect and Rotostriction. https://doi.org/10.1103/physrevb.85.094107

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