Superconducting phase diagram of multilayer square-planar nickelates.
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| Title: | Superconducting phase diagram of multilayer square-planar nickelates. |
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| Authors: | Pan, Grace A. (AUTHOR), Segedin, Dan Ferenc (AUTHOR), TenHuisen, Sophia F. R. (AUTHOR), Bhatt, Lopa (AUTHOR), LaBollita, Harrison (AUTHOR), Jiang, Abigail Y. (AUTHOR), Song, Qi (AUTHOR), Turkiewicz, Ari B. (AUTHOR), Baykusheva, Denitsa R. (AUTHOR), Nag, Abhishek (AUTHOR), Agrestini, Stefano (AUTHOR), Zhou, Ke-Jin (AUTHOR), Pelliciari, Jonathan (AUTHOR), Bisogni, Valentina (AUTHOR), Zhou, Hua (AUTHOR), Dean, Mark P. M. (AUTHOR), Paik, Hanjong (AUTHOR), Muller, David A. (AUTHOR), Kourkoutis, Lena F. (AUTHOR), Brooks, Charles M. (AUTHOR) |
| Source: | Science. 6/25/2026, Vol. 392 Issue 6805, p1390-1395. 6p. |
| Subjects: | Superconductivity, Phase diagrams, Heterostructures, Electronic structure, High temperature superconductors, Nickel |
| Abstract: | The discovery of superconductivity in square-planar nickelates has offered a rich materials platform to explore the origins of high-temperature superconductivity. However, experimental investigations have largely been limited to the infinite-layer RNiO2 (R, rare earth) nickelates. We constructed a phase diagram of multilayer square-planar Ndn+1NinO2n+2 compounds and found signatures of superconductivity for dimensionality n = 4 to 8. Upon decreasing n, the superconducting anisotropy evolves owing to 4f electron effects, and electronic structure characteristics approach cuprate-like behavior. Magnetic fluctuations persist from within the superconducting regime and into the overdoped, nonsuperconducting regime. The superconducting regime overlaps with that of chemically doped infinite-layer nickelates, demonstrating underlying commonalities as well as differences across varying structural realizations of square-planar nickelates. Our work establishes this layered template for creating new nickel-based superconductors. Editor's summary: Superconductivity in the nickelates, layered compounds with notable similarities to the cuprates, can be tuned by chemical doping and by applying pressure. Pan et al. used a different approach: varying the number of NdNiO2 layers (n) sandwiched between NdO2 layers, synthesizing a series of Ndn+1NinO2n+2 compounds. This structural tuning enabled the researchers to access a large range of behaviors, including that of cuprate-like materials at smaller n. —Jelena Stajic [ABSTRACT FROM AUTHOR] |
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| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | The discovery of superconductivity in square-planar nickelates has offered a rich materials platform to explore the origins of high-temperature superconductivity. However, experimental investigations have largely been limited to the infinite-layer RNiO2 (R, rare earth) nickelates. We constructed a phase diagram of multilayer square-planar Ndn+1NinO2n+2 compounds and found signatures of superconductivity for dimensionality n = 4 to 8. Upon decreasing n, the superconducting anisotropy evolves owing to 4f electron effects, and electronic structure characteristics approach cuprate-like behavior. Magnetic fluctuations persist from within the superconducting regime and into the overdoped, nonsuperconducting regime. The superconducting regime overlaps with that of chemically doped infinite-layer nickelates, demonstrating underlying commonalities as well as differences across varying structural realizations of square-planar nickelates. Our work establishes this layered template for creating new nickel-based superconductors. Editor's summary: Superconductivity in the nickelates, layered compounds with notable similarities to the cuprates, can be tuned by chemical doping and by applying pressure. Pan et al. used a different approach: varying the number of NdNiO2 layers (n) sandwiched between NdO2 layers, synthesizing a series of Ndn+1NinO2n+2 compounds. This structural tuning enabled the researchers to access a large range of behaviors, including that of cuprate-like materials at smaller n. —Jelena Stajic [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00368075 |
| DOI: | 10.1126/science.adp4440 |
