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).

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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