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From Doping to Dilution : Local Chemistry and Collective Interactions of La in HfO<sub>2</sub>

From Doping to Dilution : Local Chemistry and Collective Interactions of La in HfO2

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SZYJKA, Thomas, Lutz BAUMGARTEN, Oliver REHM, Claudia RICHTER, Yury MATVEYEV, Christoph SCHLUETER, Thomas MIKOLAJICK, Uwe SCHROEDER, Martina MÜLLER, 2022. From Doping to Dilution : Local Chemistry and Collective Interactions of La in HfO2. In: Physica Status Solidi (RRL) - Rapid Research Letters. Wiley. 12(11). ISSN 1862-6254. eISSN 1862-6270. Available under: doi: 10.1002/pssr.202100582

@article{Szyjka2022-11Dopin-56915, title={From Doping to Dilution : Local Chemistry and Collective Interactions of La in HfO2}, year={2022}, doi={10.1002/pssr.202100582}, number={11}, volume={12}, issn={1862-6254}, journal={Physica Status Solidi (RRL) - Rapid Research Letters}, author={Szyjka, Thomas and Baumgarten, Lutz and Rehm, Oliver and Richter, Claudia and Matveyev, Yury and Schlueter, Christoph and Mikolajick, Thomas and Schroeder, Uwe and Müller, Martina} }

Richter, Claudia From Doping to Dilution : Local Chemistry and Collective Interactions of La in HfO<sub>2</sub> Schlueter, Christoph Matveyev, Yury Schlueter, Christoph Schroeder, Uwe Schroeder, Uwe Richter, Claudia Mikolajick, Thomas Rehm, Oliver Szyjka, Thomas Müller, Martina 2022-11 Matveyev, Yury Szyjka, Thomas Mikolajick, Thomas Baumgarten, Lutz Attribution-NonCommercial-NoDerivatives 4.0 International Baumgarten, Lutz Rehm, Oliver Lanthanum (La) doping is considered as a promising route to overcome reliability issues of switchable ferroelectric HfO<sub>2</sub>-based devices. This study links the local chemistry at the La lattice sites with local and collective electronic properties of the La:HfO<sub>2</sub> matrix using hard X-ray photoelectron spectroscopy. The satellite structure of the La 3d core level, the plasmonic excitation energies, and core-level rigid binding energy shifts are investigated for La:HfO<sub>2</sub> samples with a wide range of La doping, ranging from 3.5% to 33%, i.e., from the doping to dilution level. The emerging chemical phases and electronic properties are discussed as a function of La content. From the evolution of the plasmon excitation energies and rigid binding energy shifts, it is concluded that electronic charge compensation by oxygen vacancies occurs for increasing La content. 2022-03-18T08:37:32Z 2022-03-18T08:37:32Z Müller, Martina eng

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