Ultrafast lattice response of photoexcited thin films studied by X-ray diffraction

Structural Dynamics
Daniel SchickMatias Bargheer

Abstract

Using ultrafast X-ray diffraction, we study the coherent picosecond lattice dynamics of photoexcited thin films in the two limiting cases, where the photoinduced stress profile decays on a length scale larger and smaller than the film thickness. We solve a unifying analytical model of the strain propagation for acoustic impedance-matched opaque films on a semi-infinite transparent substrate, showing that the lattice dynamics essentially depend on two parameters: One for the spatial profile and one for the amplitude of the strain. We illustrate the results by comparison with high-quality ultrafast X-ray diffraction data of SrRuO3 films on SrTiO3 substrates.

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Mar 25, 2014·Physical Review Letters·Daniel SchickMatias Bargheer

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Citations

Apr 2, 2019·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Robert SchoenleinMichael Woerner
Apr 29, 2020·Structural Dynamics·Daniel X Du, David J Flannigan
May 31, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·A KocM Bargheer
Sep 28, 2017·Physical Review Letters·M SanderP Gaal
Nov 21, 2015·Physical Review Letters·A BojahrM Bargheer
Feb 4, 2021·Structural Dynamics·S P ZeuschnerM Bargheer
May 6, 2021·Journal of Synchrotron Radiation·Matthias RössleMatias Bargheer
Jul 9, 2021·Structural Dynamics·Valentin ChardonnetEmmanuelle Jal

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Methods Mentioned

BETA
X-ray
electron diffraction

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