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Title: Resonant inelastic x-ray incarnation of Young’s double-slit experiment
Authors: Revelli, A.Moretti, Sala, M.Monaco, G.Becker, P.Bohatý, L.Hermanns, M.Koethe, T.C.Fröhlich, T.Warzanowski, P.Lorenz, T.Streltsov, S.V.van Loosdrecht, P.H.M.Khomskii, D.I.van den Brink, J.Grüninger, M.
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Issue Date: 2019
Published in: Science Advances Vol. 5 (2019), No. 1
Publisher: Washington : American Association for the Advancement of Science (A A A S)
Abstract: 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 Ba 3 CeIr 2 O 9 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.
Keywords: Barium compounds; Cerium compounds; Dimers; Electric excitation; Electron emission; Electronic structure; Excited states; Ground state; X ray scattering; Diffraction techniques; Double-slit experiment; Electronic excitation; Electronic excited state; Interference patterns; Real space structure; Resonant inelastic x-ray scattering; Sinusoidal interference pattern; Elastic scattering
DDC: 530
License: CC BY-NC 4.0 Unported
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