We identify a transient enhancement of the depolarizing field, leading to an unexpected quench of net polarization, during the growth of a prototypical metal-ferroelectric-metal epitaxial system made of BaTiO₃ and SrRuO₃. Reduced conductivity and, hence, charge screening efficiency in the early growth stage of the SrRuO₃ top electrode promotes a breakdown of ferroelectric BaTiO₃ into domains. We demonstrate how a thermal annealing procedure can recover the single-domain state. By tracking the polarization state in situ, using optical second harmonic generation, we bring new understanding to interface-related electrostatic effects in ferroelectric capacitors.
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Strkalj et al. (2019) studied this question.
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