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Femtosecond Visualization of Lattice Dynamics in Shock-Compressed Matter
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2013 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 342, no 6155, 220-223 p.Article in journal (Refereed) Published
Abstract [en]

The ultrafast evolution of microstructure is key to understanding high-pressure and strain-rate phenomena. However, the visualization of lattice dynamics at scales commensurate with those of atomistic simulations has been challenging. Here, we report femtosecond x-ray diffraction measurements unveiling the response of copper to laser shock-compression at peak normal elastic stresses of similar to 73 gigapascals (GPa) and strain rates of 10(9) per second. We capture the evolution of the lattice from a one-dimensional (1D) elastic to a 3D plastically relaxed state within a few tens of picoseconds, after reaching shear stresses of 18 GPa. Our in situ high-precision measurement of material strength at spatial (<1 micrometer) and temporal (<50 picoseconds) scales provides a direct comparison with multimillion-atom molecular dynamics simulations.

Place, publisher, year, edition, pages
2013. Vol. 342, no 6155, 220-223 p.
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Natural Sciences
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URN: urn:nbn:se:uu:diva-210175DOI: 10.1126/science.1239566ISI: 000325475200038OAI: oai:DiVA.org:uu-210175DiVA: diva2:661640
Available from: 2013-11-04 Created: 2013-11-04 Last updated: 2017-12-06Bibliographically approved

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Seibert, Marvin M.

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