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TT: Fachverband Tiefe Temperaturen

TT 30: Complex Oxides

TT 30.6: Talk

Wednesday, March 29, 2023, 10:45–11:00, HSZ 204

Electronic structure of the Fe²⁺ compound FeWO₄: a combined experimental and theoretical X-ray photoelectron spectroscopy study — •Simone G. Altendorf¹, Daisuke Takegami¹, Anna Meléndez-Sans¹, Vanda M. Pereira¹, Chang-Yang Kuo^1,2,3, Chun-Fu Chang¹, Chien-Te Chen², Masato Yoshimura², Ku-Ding Tsuei², Antoine Maignan⁴, Marcus Schmidt¹, Arata Tanaka⁵, and Liu-Hao Tjeng¹ — ¹Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany — ²National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan — ³Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan — ⁴CRISMAT, Normandie Univ, ENSICAEN, UNICAEN, CNRS, Caen 14000, France — ⁵Quantum Matter Program, Hiroshima University, Higashi-Hiroshima 739-8530, Japan

Iron tungstate (FeWO₄) is one of the rare oxide compounds with a nearly pure divalent iron valence state. We investigate the electronic structure of FeWO₄ experimentally by X-ray photoelectron spectroscopy. Using various photon energies, cross-section effects allow to identify the individual contributions of the Fe and W states to the valence band. A comparison with band structure and full atomic multiplet configuration interaction calculations yields important insights into the correlations in the material.

The research in Dresden is partially supported by the DFG through SFB 1143.