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Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 38: f-Electron Systems and Heavy Fermions

TT 38.10: Vortrag

Mittwoch, 3. April 2019, 12:15–12:30, H23

Electronic structure and valence-to-core RIXS of europium sulfide — •Jindrich Kolorenc1 and Lucia Amidani2,31Institute of Physics, Czech Academy of Sciences, Prague, Czech Republic — 2Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Germany — 3ESRF, Grenoble, France

We investigate the electronic structure of europium sulfide (EuS) with the aim to understand the valence-to-core resonant inelastic x-ray scattering (RIXS) spectra measured at the europium L3 edge. We employ LDA+DMFT for the theoretical modeling of the valence-band electronic structure as well as the RIXS spectra. More specifically, we use a generalization of the method described recently in [1].

We show that the main signal comes from the direct RIXS: an Eu 2p core electron is excited to an empty Eu 5d band above the Fermi level, and then another electron from an Eu 5d state hybridized with the S 3p bands (located below the Fermi level and hence occupied) fills back the Eu 2p core hole. Besides this straightforward channel, the measured RIXS spectra display a number of satellite features that we attempt to identify with indirect RIXS processes where additional excitations are induced by the Coulomb potential of the core hole.
J. Kolorenč, Physica B 536, 695–700 (2018).

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