Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 9: Focus Session: Frontiers in Reducible Oxide Surface Science I
O 9.5: Vortrag
Montag, 12. März 2018, 12:15–12:30, HFT-FT 131
Covalent versus localized nature of 4f electrons in ceria — •Tomáš Duchoň1, Marie Aulická1, Eike F. Schwier2, Hideaki Iwasawa2, Chuanlin Zhao3, Ye Xu3, Kateřina Veltruská1, Kenya Shimada2, and Vladimír Matolín1 — 1Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague 8, Czech Republic — 2Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 839-0046, Japan — 3Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, USA
4f electrons play an important role in the redox cycle of rare earth oxides. Here, we utilize isostructural transition between CeO2(111) and c-Ce2O3(111) to reveal the nature of 4f contribution in the valence band of cerium oxide. Separating intra- and interatomic photoemission processes via combined resonant angle-resolved photoemission spectroscopy and density functional theory investigation, we report on c-f hybridization and its modification through anion doping as a viable means of steering the surface chemistry of cerium oxide.