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Evidence for nodal superconductivity in infinite-layer nickelates

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arxiv 2201.12971 v1 pith:54LQRQ67 submitted 2022-01-31 cond-mat.supr-con

Shannon P. Harvey , Bai Yang Wang , Jennifer Fowlie , Motoki Osada , Kyuho Lee , Yonghun Lee , Danfeng Li , Harold Y. Hwang This is my paper · ORCID
classification cond-mat.supr-con
keywords infinite-layerlow-temperaturenickelatesnodalpairingsuperconductivityattributebehavior
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Infinite-layer nickelates present a new family of potential unconventional superconductors. A key open question is the superconducting pairing symmetry. We present low-temperature measurements of the London penetration depth in optimally doped La_{0.8}Sr_{0.2}NiO_{2}, Pr_{0.8}Sr_{0.2}NiO_{2}, and Nd_{0.8}Sr_{0.2}NiO_{2}. For La and Pr-nickelates, the superfluid density shows a quadratic temperature dependence, indicating nodal superconductivity in the presence of disorder. Nd-nickelate exhibits complex low-temperature behavior, which we attribute to magnetic impurities. These results are consistent with d-wave pairing.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Persistent paramagnons in high-temperature infinite-layer nickelate superconductors

    cond-mat.supr-con 2025-07 conditional novelty 6.0 of 10

    In samarium-based infinite-layer nickelates, the measured exchange coupling is about 20% smaller than in praseodymium-based nickelates despite a nearly two-fold higher Tc, opposite to the trend in cuprates.

  2. Recent progress in nickelate superconductors

    cond-mat.supr-con 2025-09 conditional novelty 2.0 of 10

    A comprehensive review of nickelate superconductors that surveys the 112, 327, and 43(10) families and frames the key open questions about their pairing mechanisms.

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