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Resonant inelastic x-ray incarnation of Young's double-slit experiment
Univ Cologne, Phys Inst 2, Zulpicher Str 77, D-50937 Cologne, Germany..
European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France.;Politecn Milan, Dipartimento Fis, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy..
Univ Trento, Dipartimento Fis, Via Sommar 14, I-38123 Povo, TN, Italy..
Inst Geol & Mineral, Abt Kristallog, Zulpicher Str 49b, D-50674 Cologne, Germany..
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2019 (English)In: Science Advances, E-ISSN 2375-2548, Vol. 5, no 1, article id eaav4020Article in journal (Refereed) Published
Abstract [en]

Young's archetypal double-slit experiment forms the basis for modern diffraction techniques: The elastic scattering of waves yields an interference pattern that captures the real-space structure. Here, we report on an inelastic incarnation of Young's experiment and demonstrate that resonant inelastic x-ray scattering (RIXS) measures interference patterns, which reveal the symmetry and character of electronic excited states in the same way as elastic scattering does for the ground state. A prototypical example is provided by the quasi-molecular electronic structure of insulating Ba3CeIr2O9 with structural Ir dimers and strong spin-orbit coupling. The double "slits" in this resonant experiment are the highly localized core levels of the two Ir atoms within a dimer. The clear double-slit-type sinusoidal interference patterns that we observe allow us to characterize the electronic excitations, demonstrating the power of RIXS interferometry to unravel the electronic structure of solids containing, e.g., dimers, trimers, ladders, or other superstructures.

Place, publisher, year, edition, pages
AMER ASSOC ADVANCEMENT SCIENCE , 2019. Vol. 5, no 1, article id eaav4020
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Condensed Matter Physics
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URN: urn:nbn:se:kth:diva-244557DOI: 10.1126/sciadv.aav4020ISI: 000457547900042PubMedID: 30746479Scopus ID: 2-s2.0-85060073689OAI: oai:DiVA.org:kth-244557DiVA, id: diva2:1295888
Note

QC 20190313

Available from: 2019-03-13 Created: 2019-03-13 Last updated: 2019-03-13Bibliographically approved

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