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The Superconducting Phase Diagram of the Infinite-Layer Nickelates

ORAL

Abstract

The recently discovered superconducting infinite-layer nickelate, Nd0.8Sr0.2NiO2 [1], provides an additional platform of studying the physics of the high-Tc superconductors in a cuprate-like system. The possible similarities and differences in the electronic structure to cuprates have been debated and attracted a lot of interest. One particular question among them is whether there is a “dome-shape” in the superconducting phase diagram of this new superconductor upon varying the Sr doping, analogous to that of cuprates. Here, we present a first study of such doping dependence of transition temperatures, lattice spacings as well as transport properties, to which controlling the crystallinity and nickel oxidation state across different dopings by our approaches to materials synthesis appears to be essential.

References:
[1] 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

  • 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

Authors

  • 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

  • Bai Yang Wang

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

  • Kyuho Lee

    Physics, Stanford University, Stanford University

  • Motoki Osada

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