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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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Raji, Aravind
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Publications (6/6 displayed)
- 2024Unraveling P‐Type and N‐Type Interfaces in Superconducting Infinite‐Layer Nickelate Thin Filmscitations
- 2024Toward Reliable Synthesis of Superconducting Infinite Layer Nickelate Thin Films by Topochemical Reductioncitations
- 2024Toward Reliable Synthesis of Superconducting Infinite Layer Nickelate Thin Films by Topochemical Reductioncitations
- 2024Valence-Ordered Thin-Film Nickelate with Tri-component Nickel Coordination Prepared by Topochemical Reductioncitations
- 2023Synthesis of infinite-layer nickelates and influence of the capping-layer on magnetotransportcitations
- 2022Fine Structure Splitting and Exciton Interactions in MoWSe2 Single-Crystalcitations
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article
Unraveling P‐Type and N‐Type Interfaces in Superconducting Infinite‐Layer Nickelate Thin Films
Abstract
International audience ; After decades of research, superconductivity is finally found in nickel-based analogs of superconducting cuprates, with infinite-layer (IL) structure. These results are so far restricted to thin films in the case of IL-nickelates. Therefore, the nature of the interface with the substrate, and how it couples with the thin film properties is still an open question. Here, using scanning transmission electron microscopy (STEM)-electron energy loss spectroscopy (EELS), a novel p-type interface defined by SrO termination with the SrTiO 3 substrate is observed in superconducting (SC) IL-praseodymium nickelate samples. Its interfacial charge and polarity are compared with the previously reported n-type interface characterized by TiO 2 termination. In combination with ab-initio calculations, it is found that the influence of the interface on the electronic structure is local and does not extend beyond 2-3 unit cells into the thin film. This decouples the direct influence of the interface in driving the superconductivity, and indicates that the IL-nickelate thin films do not have a universal interface model. Insights into the spatial hole-distribution in SC samples, provided by monochromated EELS and total reflection-hard X-ray photoemission spectroscopy, suggest that this particular distribution might be directly influencing superconductivity.