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. 2022 Jul 28;13:4367. doi: 10.1038/s41467-022-32065-x

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — a X-ray diffraction θ−2θ symmetric scans of perovskite Pr_0.82Sr_0.18NiO₃ thin film (blue) and infinite-layer Pr_0.82Sr_0.18NiO₂ thin film (red). Reciprocal space mappings (RSM) of b perovskite Pr_0.82Sr_0.18NiO₃ thin film and c infinite-layer Pr_0.82Sr_0.18NiO₂ thin film, respectively. d The atomic-resolution HAADF-STEM imaging of infinite-layer samples in a. e Temperature-dependent resistivity for perovskite Pr_0.82Sr_0.18NiO₃ thin film (blue) and infinite-layer Pr_0.82Sr_0.18NiO₂ thin film (red) which shows a high superconducting transition temperature T_c^onset ≈ 17 K, as highlighted by the red arrow in the inset of e. Inset of a shows the crystal structure of PrNiO₂.