Relevance of 3d multiplet structure in nickelate and cuprate superconductors*

The recent discovery of superconductivity in doped rare-earth infinite-layer nickelates RNiO2, R = Nd, Pr as a new family of unconventional superconductors has inspired extensive research on their intriguing properties. One of the major motivation to explore the nickelate superconductors originated from their similarities with and differences from the cuprate superconductors, which have been extensively studied over the last decades but are still lack of the thorough understanding. In this short review, we summarized our recent investigation of the relevance of Ni/Cu-3d multiplet structure on the hole doped spin states in cuprate and recently discovered nickelate superconductors via an impurity model incorporating all the 3d orbitals. Further plausible explorations to be conducted are outlined as well. Our presented work provides an insightful framework for the investigation of the strongly correlated electronic systems in terms of the multiplet structure of transition metal compounds.

Automated summary

The recent discovery of superconductivity in doped rare-earth infinite-layer nickelates RNiO2 has sparked extensive research due to its similarities and differences with cuprate superconductors. By investigating the Ni/Cu-3d multiplet structure, researchers have provided insights into the hole-doped spin states in both cuprate and nickelate superconductors, laying a foundation for further exploration in this new family of unconventional superconductors.