APS Logo

Towards Higher-Crystallinity Superconducting Infinite-Layer Nickelates

ORAL

Abstract

The recent discovery of superconductivity in the infinite-layer nickelates Re1–xSrxNiO2 (Re = Nd, Pr)1,2 presents an important materials challenge to further improve the crystallinity and synthetic reproducibility of this difficult material,3,4 so that intrinsic investigations of the superconducting and normal-state properties of this system can be initiated. After careful optimization of the growth and reduction conditions, we have identified key parameters for further improving crystallinity and established a reproducible method to stabilize Nd1–xSrxNiO2 (001) epitaxial thin films on SrTiO3 (001) substrate by pulsed-laser deposition and CaH2-assisted topochemical reduction. The details of the optimization process and the dependence of the structural and superconducting properties on the growth conditions will be discussed.

1 Li, D. et al., Nature 572, 624 (2019).
2 Osada, M. et al., Nano Lett. 20, 5735 (2020).
3 Wang, B.-X. et al., Phys. Rev. Mater. 4, 084409 (2020).
4 Lee, K. et al., APL Mater. 8, 041107 (2020).

–

Presenters

  • Kyuho Lee

    Department of Physics, Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC - Natl Accelerator Lab, Stanford Univ, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University

Authors

  • Kyuho Lee

    Department of Physics, Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC - Natl Accelerator Lab, Stanford Univ, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University

  • Danfeng Li

    Department of Applied Physics, Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC - Natl Accelerator Lab, Stanford Univ, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University

  • Motoki Osada

    Department of Applied Physics, Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC - Natl Accelerator Lab, Stanford Univ, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University

  • Bai Yang Wang

    Department of Physics, Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC - Natl Accelerator Lab, Stanford Univ, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University

  • Berit H. Goodge

    School of Applied and Engineering Physics, Cornell University, Applied and Engineering Physics, Cornell University

  • Lena Fitting Kourkoutis

    School of Applied and Engineering Physics, Cornell University, Applied and Engineering Physics, Cornell University, Cornell University

  • Harold Hwang

    Department of Applied Physics, Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC - Natl Accelerator Lab, Stanford Univ, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford University, Standford University, Stanford Institute for Materials and Energy Sciences, Stanford University and SLAC National Accelerator Laboratory, SIMES, SLAC, Applied Physics, Stanford University