A superconducting praseodymium nickel oxide with infinite-layer structure

ORAL

Abstract

Nickel oxide compounds, which are analogous to copper oxides, have been intensively investigated in the past decades since the discovery of high-Tc superconductivity in copper oxides.1 The recent discovery of superconductivity in a neodymium nickel oxide of infinite-layer structure suggests the possible existence of a family of superconducting nickel oxide.2 Here, we present the synthesis of an infinite-layer praseodymium nickel oxide by topochemical reduction of the precursor perovskite thin films using calcium hydride as reagent. We report the observation of superconductivity with Tc of 9-12 K in such compound upon doping with strontium, Pr0.8Sr0.2NiO2. Details of the materials synthesis of the infinite-layer structure, measurements on temperature-dependence of resistivity and Hall coefficient will be discussed in this presentation.

[1] J. G. Bednorz, and K. A. Muller, Z Phys. B 64, 189-194 (1986).
[2] D. Li, K. Lee, B. Y. Wang, M. Osada, S. Crossley, H. R. Lee, Y. Cui, Y. Hikita, and H. Y. Hwang, Nature 572, 624-627 (2019).

*Supported by DOE BES MSD (DE-AC02-76SF00515), the Moore Foundation (GBMF4415), and DOD AFOSR (FA 9550-16-1-0305).

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Presenters

  • Motoki Osada

    • Stanford University
    • Physics, Stanford University
    • Materials Science and Engineering, Stanford University

Authors

  • Motoki Osada

    • Stanford University
    • Physics, Stanford University
    • Materials Science and Engineering, Stanford University

  • Bai Yang Wang

    • Department of Physics, Stanford University
    • Physics, Stanford University
    • Stanford University

  • Danfeng Li

    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
    • SLAC National Accelerator Lab.
    • Physics, Stanford University
    • Stanford University
    • Applied Physics, Stanford University

  • Kyuho Lee

    • Physics, Stanford University
    • Stanford University

  • Berit Goodge

    • Cornell University
    • Applied and Engineering Physics, Cornell University

  • Lena Fitting Kourkoutis

    • Cornell University
    • Applied and Engineering Physics, Cornell University
    • Kavli Institute at Cornell for Nanoscale Science

  • Harold Hwang

    • Institute for Materials and Energy Sciences, Stanford University
    • Stanford University
    • Department of Applied Physics, Stanford University
    • Applied Physics, Stanford University
    • SIMES, SLAC
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
    • SLAC National Accelerator Lab.
    • Physics, Stanford University
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory