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Core-level nonlinear spectroscopy triggered by stochastic X-ray pulses
Phys Tech Bundesanstalt, Abbestr 2-12, D-10587 Berlin, Germany;Paul Scherrer Inst, CH-5232 Villigen, Switzerland.ORCID iD: 0000-0002-0301-2918
Paul Scherrer Inst, CH-5232 Villigen, Switzerland.ORCID iD: 0000-0003-4714-9139
Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
Paul Scherrer Inst, CH-5232 Villigen, Switzerland.
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2019 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 10, article id 4761Article in journal (Refereed) Published
Abstract [en]

Stochastic processes are highly relevant in research fields as different as neuroscience, economy, ecology, chemistry, and fundamental physics. However, due to their intrinsic unpredictability, stochastic mechanisms are very challenging for any kind of investigations and practical applications. Here we report the deliberate use of stochastic X-ray pulses in two-dimensional spectroscopy to the simultaneous mapping of unoccupied and occupied electronic states of atoms in a regime where the opacity and transparency properties of matter are subject to the incident intensity and photon energy. A readily transferable matrix formalism is presented to extract the electronic states from a dataset measured with the monitored input from a stochastic excitation source. The presented formalism enables investigations of the response of the electronic structure to irradiation with intense X-ray pulses while the time structure of the incident pulses is preserved.

Place, publisher, year, edition, pages
Nature Publishing Group, 2019. Vol. 10, article id 4761
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Physical Chemistry
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URN: urn:nbn:se:uu:diva-399093DOI: 10.1038/s41467-019-12717-1ISI: 000490982100001PubMedID: 31628306OAI: oai:DiVA.org:uu-399093DiVA, id: diva2:1379073
Funder
Knut and Alice Wallenberg Foundation, KAW-2013.0020Available from: 2019-12-16 Created: 2019-12-16 Last updated: 2019-12-16Bibliographically approved

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