| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Offi, F.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2021Identification of hidden orbital contributions in the La_{0.65} Sr_{0.35} MnO_{3} valence band
- 2021Identification of hidden orbital contributions in the La$_{0.65}$Sr$_{0.35}$MnO$_3$ valence bandcitations
- 2021Identification of hidden orbital contributions in the La0.65Sr0.35MnO3 valence bandcitations
- 2018Charge-transfer in B-site-depleted NdGaO3/SrTiO3 heterostructurescitations
- 2016Observation of Distinct Bulk and Surface Chemical Environments in a Topological Insulator under Magnetic dopingcitations
- 2016Nature of electronic states at the Fermi level of metallic beta-PbO2 revealed by hard x-ray photoemission spectroscopycitations
- 2007Comparison of hard and soft x-ray photoelectron spectra of siliconcitations
- 2003Time-resolved magnetic domain imaging by x-ray photoemission electron microscopycitations
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article
Charge-transfer in B-site-depleted NdGaO3/SrTiO3 heterostructures
Abstract
<p>Cation stoichiometry has been identified as a major key in establishing 2-dimensional electron gases (2DEGs) in oxide heterostructures. Here, we discuss a 2DEG formation scenario in B-site deficient perovskite/perovskite heterostructures, which previously were predicted to show insulating behavior. We elaborate an ionic picture based on oxygen-vacancy-buffered B-site vacancy defects in the polar oxide layer that yields a continuous transition from 2DEG formation to less conducting interfaces to insulating interfaces with increasing B-site deficiency. Experimentally, a corresponding modulation of charge transfer across NdGaO<sub>3</sub>/SrTiO<sub>3</sub> interfaces is inferred using hard x-ray photoelectron spectroscopy analysis and transport experiments. With increasing B-site deficiency, we observe a decrease of the interfacial Ti<sup>3+</sup> core level contribution, indicating a reduced charge transfer at the interface. This result is corroborated by temperature-dependent transport measurements, revealing increased low temperature resistance, with a dominant influence of a reduced electron density in the Ga-depleted sample. We consider a redistribution of oxygen vacancies in the B-site deficient polar oxide layer to explain the alleviated interface reconstruction, adding a new perspective on potential built-up in polar-oxide thin films.</p>