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Ultrafast structural dynamics of perovskite superlattices

  • Femtosecond x-ray diffraction provides direct insight into the ultrafast reversible lattice dynamics of materials with a perovskite structure. Superlattice (SL) structures consisting of a sequence of nanometer-thick layer pairs allow for optically inducing a tailored stress profile that drives the lattice motions and for limiting the influence of strain propagation on the observed dynamics. We demonstrate this concept in a series of diffraction experiments with femtosecond time resolution, giving detailed information on the ultrafast lattice dynamics of ferroelectric and ferromagnetic superlattices. Anharmonically coupled lattice motions in a SrRuO3/PbZr0.2Ti0.8O3 (SRO/ PZT) SL lead to a switch-off of the electric polarizations on a time scale of the order of 1 ps. Ultrafast magnetostriction of photoexcited SRO layers is demonstrated in a SRO/SrTiO3 (STO) SL.

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Author details:Michael Woerner, Clemens von Korff Schmising, Matias BargheerORCiDGND, Nickolai Zhavoronkov, Ionela Vrejoiu, Dietrich Hesse, Marin AlexeORCiDGND, Thomas Elsaesser
URL:http://www.springerlink.com/content/100501
DOI:https://doi.org/10.1007/s00339-009-5174-6
ISSN:0947-8396
Publication type:Article
Language:English
Year of first publication:2009
Publication year:2009
Release date:2017/03/25
Source:Applied physics A. - ISSN 0947-8396. - 96 (2009), 1, S. 83 - 90
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer review:Referiert
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