The superconducting nickelates were first proposed as potential analogs to the cuprate unconventional superconductors in 1999, but it took twenty years before superconductivity was successfully stabilized in epitaxial thin films. Since then, a flurry of both experimental and theoretical efforts have sought to understand the similarities and differences between the two systems and how they manifest in the macroscopic superconducting and normal state properties. Although the nickelates and cuprates indeed share many commonalities within their respective phase diagrams, several notable differences have also emerged, especially regarding their parent compounds, electronic hybridization, and fermiology. Here, we provide a survey of the rapidly developing landscape of layered nickelate superconductors, including recent experimental progress to probe not just the superconducting but also normal state and other ordered phases stabilized in these compounds.

中文翻译：

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超导镍酸盐的实验进展


超导镍酸盐于 1999 年首次被提出作为铜酸盐非常规超导体的潜在类似物，但超导性花了 20 年时间才在外延薄膜中成功稳定。从那时起，一系列实验和理论努力试图了解这两个系统之间的相似之处和不同之处，以及它们如何在宏观超导和正常状态特性中表现出来。尽管镍酸盐和铜酸盐在各自的相图中确实有许多共同点，但也出现了一些显着的差异，尤其是在它们的母体化合物、电子杂化和费米学方面。在这里，我们提供了对层状镍酸盐超导体快速发展前景的调查，包括最近的实验进展，不仅探测了超导，还探测了这些化合物中稳定的正常态和其他有序相。