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Conferences > CLEO_QELS > 2018 > FM4F > FM4F.4

Ultrafast X-ray Diffraction Reveals a Soft-Mode Driven Reversal of Polarity in Ferroelectrics

Christoph Hauf, Antonio-Andres Hernandez Salvador, Marcel Holtz, Michael Woerner, and Thomas Elsaesser

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Abstract

Transient charge density maps of photoexcited ferroelectric ammonium sulfate are determined by femtosecond x-ray diffraction. We observe a previously unknown soft-mode that induces a transient reversal of the full macroscopic electric polarization.

© 2018 The Author(s)

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