Regensburg 2025 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 13: Poster
DS 13.49: Poster
Donnerstag, 20. März 2025, 18:00–20:00, P1
Oxygen vacancy mediated epitaxial superstructure thin film in tungsten sub-oxides — •Kyeong Jun Lee1, Hyowon Seo2, Yeong Gwang Kim2, Yong-Jun Kwon3, Bongju Kim1, Minu Kim1, Chan Ho Yang3, Hyun Hwi Lee4, Sang-youn Park4, Gyungtae Kim5, Jung-ho Kim6, Young Jun Chang2, and Seo Hyoung Chang1 — 1Department of Physics, Chung-Ang University, Seoul 06974, South Korea — 2Department of Physics, University of Seoul, Seoul 02504, South Korea — 3Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea — 4Pohang Accelerator Laboratory, POSTECH, Pohang 37673, South Korea — 5National NanoFab Center, Daejeon 34141, South Korea — 6Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
In metal oxides, oxygen vacancies are key to enhancing energy conversion and unconventional properties. Crystallographic shear (CS) planes in these structures are vital for electrochemical electrodes. While powders and polycrystals are well studied, research on single crystals or epitaxial films is essential to link oxygen vacancies with electronic and crystal structures. We fabricated epitaxial {103} CS superstructures in tungsten sub-oxides (Magnéli phases) on NdGaO3 (110)o substrates. X-ray scattering, AFM, and TEM confirmed epitaxial growth. W L3 RIXS revealed W6+ 5d0 and W6+ 5d1 states, showing oxygen vacancies' role in mediating superstructures and electronic properties.
Keywords: Crystallographic shear plane; tungsten oxide; resonant inelastic x-ray scattering; epitaxial thin film; oxygen vacancy