Daily Overview: Today’s highlighted work focuses on a systematic study of the doping evolution of local magnetic moments in the infinite-layer nickelate (La,Sr)NiO₂. Using muon spin rotation (μSR), the authors measured a series of samples spanning from the parent compound, across the superconducting dome, to the overdoped region (Sr doping 0% ≤ x ≤ 25%). They found that, regardless of doping level, local magnetic moments undergo spin freezing on the order of tens of kelvin and enter a glassy state, with no significant anomaly observed near the superconducting onset. This indicates that the magnetism in nickelates is intrinsic and essentially unaffected by hole concentration, and that magnetism and superconductivity are largely decoupled; the underlying indirect interactions need to be understood within a multiorbital framework. arXiv submission processing window: 2026-09-04 00:00 to 2026-09-04 00:00 UTC.

1. Doping dependence of local moments in infinite layer nickelates

Summary: Using muon spin rotation/relaxation (μSR), this study systematically measured a series of infinite-layer nickelate (La,Sr)NiO₂ samples spanning from the parent compound through the superconducting dome to the overdoped regime (Sr doping 0% ≤ x ≤ 25%) to probe the magnetic ground state and temperature-dependent static and dynamic magnetism. The results show that, regardless of doping level, local magnetic moments undergo spin freezing at temperatures on the order of tens of kelvin and enter a glassy state, and no anomaly is observed near the superconducting onset, indicating that the magnetism is intrinsic and essentially independent of hole concentration. With increasing hole doping, the glassy state shows only a weak tendency toward destabilization. These observations suggest that magnetism and superconductivity in nickelates are largely decoupled, and that their indirect interactions need to be understood within a multiorbital framework.