1. Ultrafast multi-cycle terahertz measurements of the electrical conductivity in strongly excited solids
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B. B. L. Witte, N. Stojanovic, J. B. Kim, Ekaterina Zapolnova, Ronald Redmer, Catherine Burcklen, Regina Soufli, Mianzhen Mo, Sven Toleikis, Zhijiang Chen, Sergey Usenko, Saša Bajt, T. Pardini, R. Zhang, Rui Pan, Benjamin K. Ofori-Okai, Lars Seipp, S. H. Glenzer, Stefan P. Hau-Riege, F. Treffert, Maxence Gauthier, Anthea Weinmann, Chandra Curry, Ying Y. Tsui, and J. Schein
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Electronic properties and materials ,Materials science ,Terahertz radiation ,Science ,General Physics and Astronomy ,Physics::Optics ,02 engineering and technology ,Electron ,X-ray FEL ,Conductivity ,Characterization and analytical techniques ,01 natural sciences ,Article ,General Biochemistry, Genetics and Molecular Biology ,law.invention ,Plasma ,law ,Electrical resistivity and conductivity ,0103 physical sciences ,010306 general physics ,Terahertz optics ,Multidisciplinary ,business.industry ,Scattering ,Free-electron laser ,Laser-produced plasmas ,General Chemistry ,Warm dense matter ,021001 nanoscience & nanotechnology ,Laser ,Warm Dense Matter ,Ultrafast ,Optoelectronics ,THz ,ddc:500 ,Electronic structure of atoms and molecules ,0210 nano-technology ,business - Abstract
Nature Communications 12(1), 1638 (2021). doi:10.1038/s41467-021-21756-6, Key insights in materials at extreme temperatures and pressures can be gained by accurate measurements that determine the electrical conductivity. Free-electron laser pulses can ionize and excite matter out of equilibrium on femtosecond time scales, modifying the electronic and ionic structures and enhancing electronic scattering properties. The transient evolution of the conductivity manifests the energy coupling from high temperature electrons to low temperature ions. Here we combine accelerator-based, high-brightness multi-cycle terahertz radiation with a single-shot electro-optic sampling technique to probe the evolution of DC electrical conductivity using terahertz transmission measurements on sub-picosecond time scales with a multi-undulator free electron laser. Our results allow the direct determination of the electron-electron and electron-ion scattering frequencies that are the major contributors of the electrical resistivity., Published by Nature Publishing Group UK, [London]
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- 2021
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