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Synthesis and Superconductivity of Infinite-Layer Nickelate Films

Invited

Abstract

Since their discovery, superconductivity in cuprates has motivated the search for materials with analogous electronic or atomic structure. We have used soft chemistry approaches to synthesize superconducting infinite layer nickelates from their perovskite precursor phase, using topotactic reactions [1,2]. We will present the synthesis and transport properties of the nickelate superconductors, our current understanding of the electronic structure [3,4], and observation of a doping-dependent superconducting dome in (Nd,Sr)NiO2 [5], similar to cuprates. While cuprate superconductivity is bounded by an insulator for underdoping and a metal for overdoping, here we observe weakly insulating behavior on either side of the dome. Furthermore, the Hall effect suggests the presence of both electron- and hole-like bands, consistent with band structure calculations. Finally, the observation of superconductivity in (Pr,Sr)NiO2 suggests the possibility of a broad family of nickelate superconductors [6].

[1] D. Li, K. Lee, B.Y. Wang, M. Osada, S. Crossley, H.R. Lee, Y. Cui, Y. Hikita, HYH, Nature 572, 624 (2019).
[2] K. Lee, B.H. Goodge, D. Li, M. Osada, B.Y. Wang, Y. Cui, L. F. Kourkoutis, HYH, APL Mater. 8, 041107 (2020).
[3] M. Hepting, D. Li, C.J. Jia, H. Lu, E. Paris, Y. Tseng, X. Feng, M. Osada, E. Been, Y. Hikita, Y.-D. Chuang, Z. Hussain, K.J. Zhou, A. Nag, M. Garcia-Fernandez, M. Rossi, H.Y. Huang, D.J. Huang, Z.X. Shen, T. Schmitt, HYH, B. Moritz, J. Zaanen, T.P. Devereaux, W.S. Lee, Nat. Mater. 19, 381 (2020).
[4] B.H. Goodge, D. Li, M. Osada, B.Y. Wang, K. Lee, G.A. Sawatzky, HYH, L.F. Kourkoutis, arXiv:2005.02847.
[5] D. Li, B.Y. Wang, K. Lee, S.P. Harvey, M. Osada, B.H. Goodge, L.F. Kourkoutis, HYH, PRL 125, 027001 (2020).
[6] M. Osada, B.Y. Wang, B.H. Goodge, K. Lee, H. Yoon, K. Sakuma, D. Li, M. Miura, L.F. Kourkoutis, HYH, Nano Lett. 20, 5735 (2020).

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Presenters

  • 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

Authors

  • 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