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O: Fachverband Oberflächenphysik
O 67: Focus Session: Unoccupied States by Inverse Photoemission II
O 67.2: Vortrag
Mittwoch, 11. März 2026, 15:30–15:45, WILL/A317
Surface-orientation-dependent unoccupied electronic states of Fe3O4 — •Jan Bieling and Markus Donath — Universität Münster, Germany
Experimental studies of the occupied electronic states of magnetite (Fe3O4) have revealed that the observed properties, such as band dispersions, are strongly surface-orientation-dependent [1,2]. However, comparable systematic studies of the unoccupied electronic states of different Fe3O4 surfaces are still lacking.
We report on the unoccupied electronic states of a well-characterized Fe3O4(111) surface using angle-resolved inverse photoemission and compare the results with our previous study of Fe3O4(100) [3]. This direct comparison allows for (re)interpreting the spectral features observed for both surfaces.
Finally, we discuss our findings in the context of recent theoretical studies [4,5]. We report a very good agreement between our inverse photoemission spectra of Fe3O4(100) and the theoretical results obtained from DFT+U+V for this surface.
[1] Y. Dedkov et al., Phys. Rev. B 70, 073405 (2004)
[2] W. Wang et al., Phys. Rev. B 87, 085118 (2013)
[3] J. Bieling and M. Donath, Phys. Rev. B 111, 075117 (2025)
[4] N. Naveas et al., J. Chem. Theory Comput. 19, 8610-8623 (2023)
[5] N. Naveas et al., Results Phys. 70, 108158 (2025)
Keywords: Magnetite; Iron oxides; Inverse photoemission