A study of conduction band edge states in complex oxides by X-ray absorption spectroscopy |
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| Institution: | 1. Department of Materials Science, North Carolina State University, Raleigh, NC, USA;2. Department of Materials Science, Pennsylvania State University, State College, PA, USA;3. Department of Physics, North Carolina State University, Raleigh, NC, USA;4. Stranford Synchrotron Radiation Labs, Stanford University, Menlo Park, CA, USA;1. School of Physics, University of Melbourne, Victoria 3010, Australia;1. Institute for Energy Technology, P.O. Box 40, NO-2027 Kjeller, Norway;2. Centre for Hydrogen Energy Technologies, Lithuanian Energy Institute, 3 Breslaujos st., LT-44403 Kaunas, Lithuania;1. Radiation Engineering Department, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority, Nasr City, 11787, Cairo, Egypt;2. Centre for Photonics and Smart Materials, Zewail City of Science and Technology, October Gardens, 12578, 6th of October City, Giza, Egypt;3. Electrical Engineering Department, Southern Taiwan University of Science and Technology, Tainan City, Taiwan;4. Nanotechnology Engineering Program, Zewail City of Science and Technology, October Gardens, 12578, 6th of October City, Giza, Egypt;5. Faculty of Engineering, Mansoura University, Mansoura, Daqahlia, 35516, Egypt;6. Faculty of Engineering of Shoubra Banha University, Cairo, Egypt;1. Computational Science Interdisciplinary Program, Seoul National University, Seoul 08826, Republic of Korea;2. Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Republic of Korea;3. Center for Theoretical Physics, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea;1. School of Materials Science and Engineering and Fujian Provincial Key Laboratory of Functional Materials and Applications, Xiamen University of Technology, Xiamen 361024, China;2. School of Marine Engineering and Fujian Provincial Key Laboratory of Naval Architecture and Ocean Engineering, Jimei University, Xiamen 361021, China;3. Institute of Advanced Wear & Corrosion Resistance and Functional Materials, Jinan University, Guangzhou 510632, China |
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| Abstract: | Conduction band edge d-states are compared for complex oxides: (i) mixed tetravalent–trivalent ZrO2–Y2O3 alloys, (ii) tetravalent Zr(Hf)O2–TiO2 alloys, and (iii) trivalent La scandate and aluminate. Low Y2O3 content cubic ZrO2–Y2O3 alloys display two crystal-field split 4d-features in O K1 spectra. Alloys with higher Y2O3 content, as well as Zr(Hf)O2–TiO2 alloys display increased d-state multiplicity. O K1 spectra of perovskite-structured LaScO3 and LaAlO3 indicate Jahn–Teller d-state term-splittings with contributions from both trivalent atomic species. |
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