Ultrafast lattice response of photoexcited thin films studied by X-ray diffraction
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 pro...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC and ACA
2014-11-01
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| Series: | Structural Dynamics |
| Online Access: | http://dx.doi.org/10.1063/1.4901228 |
| _version_ | 1828897913515802624 |
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| author | Daniel Schick Marc Herzog André Bojahr Wolfram Leitenberger Andreas Hertwig Roman Shayduk Matias Bargheer |
| author_facet | Daniel Schick Marc Herzog André Bojahr Wolfram Leitenberger Andreas Hertwig Roman Shayduk Matias Bargheer |
| author_sort | Daniel Schick |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-13T15:06:09Z |
| format | Article |
| id | doaj.art-cbb55b4e73924f5b9fd5e38e859d048d |
| institution | Directory Open Access Journal |
| issn | 2329-7778 |
| language | English |
| last_indexed | 2024-12-13T15:06:09Z |
| publishDate | 2014-11-01 |
| publisher | AIP Publishing LLC and ACA |
| record_format | Article |
| series | Structural Dynamics |
| spelling | doaj.art-cbb55b4e73924f5b9fd5e38e859d048d2022-12-21T23:41:00ZengAIP Publishing LLC and ACAStructural Dynamics2329-77782014-11-0116064501064501-1310.1063/1.4901228001406SDYUltrafast lattice response of photoexcited thin films studied by X-ray diffractionDaniel Schick0Marc Herzog1André Bojahr2Wolfram Leitenberger3Andreas Hertwig4Roman Shayduk5Matias Bargheer6 Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 87, 12205 Berlin, Germany Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Straße 15, 12489 Berlin, Germany Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, GermanyUsing 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.http://dx.doi.org/10.1063/1.4901228 |
| spellingShingle | Daniel Schick Marc Herzog André Bojahr Wolfram Leitenberger Andreas Hertwig Roman Shayduk Matias Bargheer Ultrafast lattice response of photoexcited thin films studied by X-ray diffraction Structural Dynamics |
| title | Ultrafast lattice response of photoexcited thin films studied by X-ray diffraction |
| title_full | Ultrafast lattice response of photoexcited thin films studied by X-ray diffraction |
| title_fullStr | Ultrafast lattice response of photoexcited thin films studied by X-ray diffraction |
| title_full_unstemmed | Ultrafast lattice response of photoexcited thin films studied by X-ray diffraction |
| title_short | Ultrafast lattice response of photoexcited thin films studied by X-ray diffraction |
| title_sort | ultrafast lattice response of photoexcited thin films studied by x ray diffraction |
| url | http://dx.doi.org/10.1063/1.4901228 |
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