Abstract
We investigate coherent phonon propagation in a thin film of ferroelectric (PZT) by ultrafast x-ray diffraction experiments, which are analyzed as time-resolved reciprocal space mapping in order to observe the in- and out-of-plane structural dynamics, simultaneously. The mosaic structure of the PZT leads to a coupling of the excited out-of-plane expansion to in-plane lattice dynamics on a picosecond time scale, which is not observed for out-of-plane compression.
- Received 24 October 2012
DOI:https://doi.org/10.1103/PhysRevLett.110.095502
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