Doping dependence of local moments in infinite layer nickelates
Abstract
The infinite layer nickelates are notable for their lack of long-range antiferromagnetic ordering, in contrast to the parent compounds of the superconducting cuprates. Instead, the nickelates show evidence of short-range glassy behavior in both the undoped and optimally-doped regimes, implying that local electronic moments exist independent of superconductivity. However, the systematic doping-dependent magnetic behavior is not yet fully resolved, and characterizing it could uncover the relationship between local moments and the superconducting dome. In this work, we use muon spin rotation (μSR) on a (La,Sr)NiO2 doping series from the undoped parent compound, through the superconducting dome, to the over-doped normal state (Sr substitution 0% ≤ x ≤ 25%) to probe the magnetic ground state and the temperature-dependent static and dynamic behavior. We find that local moments experience spin freezing into a glassy state at temperatures on the order of a few tens of kelvin regardless of the doping level. We also observe a subtle destabilization of the glassy state with increased hole doping. These observations suggest that magnetism and superconductivity are largely decoupled phenomena with indirect interactions described in a multi-orbital framework.
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BibTeX
@misc{gonzalez2026doping,
title = {{Doping dependence of local moments in infinite layer nickelates}},
author = {Martin Gonzalez and Andreas Suter and Michal Kiaba and Thomas Prokscha and Zaher Salman and Marc Gabay and Harold Y. Hwang and Jennifer Fowlie},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.03388},
eprint = {2609.03388},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.03388},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Doping dependence of local moments in infinite layer nickelates
AU - Martin Gonzalez
AU - Andreas Suter
AU - Michal Kiaba
AU - Thomas Prokscha
AU - Zaher Salman
AU - Marc Gabay
AU - Harold Y. Hwang
AU - Jennifer Fowlie
PY - 2026
DA - 2026/09/03
PB - arXiv
DO - 10.48550/arxiv.2609.03388
UR - https://arxiv.org/abs/2609.03388
AB - The infinite layer nickelates are notable for their lack of long-range antiferromagnetic ordering, in contrast to the parent compounds of the superconducting cuprates. Instead, the nickelates show evidence of short-range glassy behavior in both the undoped and optimally-doped regimes, implying that local electronic moments exist independent of superconductivity. However, the systematic doping-dependent magnetic behavior is not yet fully resolved, and characterizing it could uncover the relationship between local moments and the superconducting dome. In this work, we use muon spin rotation (μSR) on a (La,Sr)NiO_2 doping series from the undoped parent compound, through the superconducting dome, to the over-doped normal state (Sr substitution 0% ≤ x ≤ 25%) to probe the magnetic ground state and the temperature-dependent static and dynamic behavior. We find that local moments experience spin freezing into a glassy state at temperatures on the order of a few tens of kelvin regardless of the doping level. We also observe a subtle destabilization of the glassy state with increased hole doping. These observations suggest that magnetism and superconductivity are largely decoupled phenomena with indirect interactions described in a multi-orbital framework.
ER -