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VH-NG-1105

Novel soft X-ray spectroscopies for materials science

CoordinatorBeye, Martin ; Wurth, Wilfried
Grant period2016-2021
Funding bodyHelmholtz Gemeinschaft Deutscher Forschungszentren
 HGF
Further information: Programmorientierte Förderung von DESY
IdentifierG:(DE-HGF)2016_IVF-VH-NG-1105

⇧ Impuls- und Vernetzungsfonds ⇧

Note: Functionality of materials is a result of a particular reaction to external stimuli. Most generally, the excitation spectrum contains all the information about the material: e.g. the absence of excitations in the optical regime and below leads to an optically transparent, insulating material. The existence of a superconducting gap in the excitation spectrum yields the ability to transport electric currents without losses. Soft X-ray spectroscopies address the excitation spectrum of materials with sensitivity to surfaces and interfaces, selecting signals from the active chemical elements in a compound with specificity to order and symmetries, addressing occupied and unoccupied electronic states. Unfortunately, this powerful information is often accompanied with limited signal levels and sample damage under strong X-ray irradiation needs to be accounted for. Here, it is proposed to develop novel techniques that fully use coherences in the sample and in optical and X-ray laser beams. Using the unique beam quality produced by X-ray free- electron lasers will allow to study materials with orders of magnitude stronger signals, thus allowing for a reduction of measurement times and exposure to radiation. Alternatively, a much larger parameter space can be sampled, e.g. enabling studies of ultrafast dynamics on the relevant femtosecond timescale. A suite of methods is proposed, transferring concepts from optical laser spectroscopy to the X-ray world. Fully using the coherence in a free- electron laser X-ray beam promises to have an impact similar to the step to lasers in optical spectroscopy. In order to develop this methodology and to apply it to further our understanding and ability to tailor functional materials, a program with three work packages is proposed. The final experimental realization and application to e.g. manganite systems is preceded by the development of an appropriate, flexible instrument and the identification of optimal experimental parameters through a complete modeling of the underlying processes.
 

Recent Publications

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Simultaneous mapping of the ultrafast time and fluence dependence of the laser-induced insulator-to-metal transition in magnetite
Structural dynamics 12(2), 024302 () [10.1063/4.0000288] special issue: "Celebrating the work and the achievements of Jo Stöhr"  GO OpenAccess  Download fulltext Files  Download fulltextFulltext BibTeX | EndNote: XML, Text | RIS

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A compact approach to higher-resolution resonant inelastic x-ray scattering detection using photoelectrons
New journal of physics 26(5), 053008 () [10.1088/1367-2630/ad4206]  GO OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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Optical control of 4f orbital state in rare-earth metals
Science advances 10(16), eadk9522 () [10.1126/sciadv.adk9522]  GO OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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Electron Population Dynamics in Resonant Non-Linear X-ray Absorption in Nickel at a Free-Electron Laser
Structural dynamics 10(5), 054501 () [10.1063/4.0000206] special issue: "The advent of ultrafast X-ray absorption spectroscopy"  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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Symmetry-resolved CO desorption and oxidation dynamics on O/Ru(0001) probed at the C K-edge by ultrafast x-ray spectroscopy
The journal of chemical physics 157(16), 164705 () [10.1063/5.0114399]  GO Embargoed OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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Microstructure effects on the phase transition behavior of a prototypical quantum material
Scientific reports 12(1), 10464 () [10.1038/s41598-022-13872-0]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext BibTeX | EndNote: XML, Text | RIS

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Shot noise limited soft X-ray absorption spectroscopy in solution at a SASE-FEL using a transmission grating beam splitter
Structural dynamics 8(1), 014303 (1-7) () [10.1063/4.0000049]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext BibTeX | EndNote: XML, Text | RIS

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Soft X-ray imaging spectroscopy with micrometer resolution
Optica 8(2), 156 - 160 () [10.1364/OPTICA.405977]  GO OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Report
Sachbericht 2019 [VH-NG-1105]
7 pp. () [10.3204/PUBDB-2020-04007]  GO OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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Parallel Broadband Femtosecond Reflection Spectroscopy at a Soft X-Ray Free-Electron Laser
Applied Sciences 10(19), 6947 () [10.3390/app10196947] special issue: "Ultrafast X-ray spectroscopies"  GO OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

All known publications ...
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 Record created 2016-07-06, last modified 2019-05-24
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