TY  - JOUR
A1  - Woerner, Michael
A1  - von Korff Schmising, Clemens
A1  - Bargheer, Matias
A1  - Zhavoronkov, Nickolai
A1  - Vrejoiu, Ionela
A1  - Hesse, Dietrich
A1  - Alexe, Marin
A1  - Elsaesser, Thomas
T1  - Ultrafast structural dynamics of perovskite superlattices
N2  - 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.
Y1  - 2009
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/32006
UR  - http://www.springerlink.com/content/100501
SN  - 0947-8396
ER  -