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arXiv · 1806.02640

Polarization dependent chemistry of ferroelectric BaTiO3 (001) domains

Yanyu Mi·Gregory Geneste·Julien Rault·Claire Mathieu·Alexandre Pancotti·Nicholas Barrett
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Abstract

Recent works suggest that the surface chemistry, in particular, the presence of oxygen vacancies can affect the polarization in a ferroelectric material. This should, in turn, influence the domain ordering driven by the need to screen the depolarizing field. Here we show using density functional theory that the presence of oxygen vacancies at the surface of BaTiO3 (001) preferentially stabilizes an inward pointing, P-, polarization. Mirror electron microscopy measurements of the domain ordering confirm the theoretical results.

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Yanyu Mi, Gregory Geneste, Julien Rault, Claire Mathieu, Alexandre Pancotti, Nicholas Barrett. 2018-06-07. Polarization dependent chemistry of ferroelectric BaTiO3 (001) domains. https://doi.org/10.1088/0953-8984%2F24%2F27%2F275901

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