Towards reliable synthesis of superconducting infinite layer nickelate thin films by topochemical reduction
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866929277217275904 |
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| author | Gutiérrez-Llorente, Araceli Raji, Aravind Zhang, Dongxin Divay, Laurent Gloter, Alexandre Gallego, Fernando Galindo, Christophe Bibes, Manuel Iglesias, Lucia |
| author_facet | Gutiérrez-Llorente, Araceli Raji, Aravind Zhang, Dongxin Divay, Laurent Gloter, Alexandre Gallego, Fernando Galindo, Christophe Bibes, Manuel Iglesias, Lucia |
| contents | Infinite layer nickelates provide a new route beyond copper oxides to address outstanding questions in the field of unconventional superconductivity. However, their synthesis poses considerable challenges, largely hindering experimental research on this new class of oxide superconductors. That synthesis is achieved in a two-step process that yields the most thermodynamically stable perovskite phase first, then the infinite-layer phase by topotactic reduction, the quality of the starting phase playing a crucial role. Here, we report on reliable synthesis of superconducting infinite-layer nickelate films after successive topochemical reductions of a parent perovskite phase with nearly optimal stoichiometry. Careful analysis of the transport properties of the incompletely reduced films reveals an improvement of the strange metal behaviour of their normal state resistivity over subsequent topochemical reductions, offering insight into the reduction process. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_12307 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Towards reliable synthesis of superconducting infinite layer nickelate thin films by topochemical reduction Gutiérrez-Llorente, Araceli Raji, Aravind Zhang, Dongxin Divay, Laurent Gloter, Alexandre Gallego, Fernando Galindo, Christophe Bibes, Manuel Iglesias, Lucia Superconductivity Materials Science Infinite layer nickelates provide a new route beyond copper oxides to address outstanding questions in the field of unconventional superconductivity. However, their synthesis poses considerable challenges, largely hindering experimental research on this new class of oxide superconductors. That synthesis is achieved in a two-step process that yields the most thermodynamically stable perovskite phase first, then the infinite-layer phase by topotactic reduction, the quality of the starting phase playing a crucial role. Here, we report on reliable synthesis of superconducting infinite-layer nickelate films after successive topochemical reductions of a parent perovskite phase with nearly optimal stoichiometry. Careful analysis of the transport properties of the incompletely reduced films reveals an improvement of the strange metal behaviour of their normal state resistivity over subsequent topochemical reductions, offering insight into the reduction process. |
| title | Towards reliable synthesis of superconducting infinite layer nickelate thin films by topochemical reduction |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2401.12307 |