Rare-earth Dependence of the Superfluid Density in Nickelates

ORAL

Abstract

Infinite-layer nickelates present a new family of strongly correlated superconductors [1-3]. Some key open questions include the superconducting gap symmetry and their potential dependence on the rare-earth elements [4,5]. Here we present our characterization of the superfluid density in (R,Sr)NiO2 (R = La, Pr, Nd) utilizing the mutual inductance measurement technique [5]. For La and Pr-nickelates, the superfluid density shows a quadratic temperature dependence, indicating nodal superconducting gap structure in the presence of disorder. Nd-nickelate instead exhibits complex low-temperature behavior due to the magnetic contribution of the Nd3+ 4f moments [6]. These results are consistent with the unconventional nature of superconductivity in the nickelates.

[1] D. Li et al., Nature 572, 624 (2019).

[2] Y. Nomura and R. Arita, Rep. Prog. Phys. 85, 052501 (2022).

[3] A. S. Botana, F. Bernardini, and A. Cano, J. Exp. Theor. Phys. 132, 618 (2021).

[4] L. E. Chow et al., Preprint at https://arxiv.org/abs/2201.10038 (2022).

[5] S. P. Harvey et al., Preprint at https://arxiv.org/abs/2201.12971 (2022).

[6] B. Y. Wang et al., Preprint at https://arxiv.org/abs/2205.15355 (2022).

*Supported by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under contract No. DE-AC02-76SF00515 and the Gordon and Betty Moore Foundation's Emergent Phenomena in Quantum Systems Initiative (grant no. GBMF9072. J. F. was also supported by the Swiss National Science Foundation through Postdoc.Mobility P400P2199297.

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Presenters

  • Bai Yang Wang

    • Stanford University
    • Stanford University, SLAC National Accelerator Laboratory

Authors

  • Bai Yang Wang

    • Stanford University
    • Stanford University, SLAC National Accelerator Laboratory

  • Shannon Harvey

    • Stanford University

  • Jennifer Fowlie

    • Stanford University
    • Stanford University, SLAC National Accelerator Laboratory

  • Motoki Osada

    • Stanford Univ

  • Kyuho Lee

    • Stanford University
    • Stanford University, SLAC National Accelerator Laboratory

  • Yonghun Lee

    • Stanford University
    • Stanford University, SLAC National Accelerator Laboratory

  • Danfeng Li

    • Stanford University
    • City University of Hong Kong

  • Harold Hwang

    • Stanford Univ
    • Stanford University