A superconducting praseodymium nickelate with infinite layer structure

Abstract

A variety of nickel oxide compounds have long been studied for their manifestation of various correlated electron phenomena. Recently, superconductivity was observed in nanoscale infinite layer nickelate thin films of Nd${}_{0.8}$Sr${}_{0.2}$NiO${}_2$, epitaxially stabilized on SrTiO${}_3$ substrates via topotactic reduction from the perovskite precursor phase. Here we present the synthesis and properties of PrNiO${}_2$ thin films on SrTiO${}_3$. Upon doping in Pr${}_{0.8}$Sr${}_{0.2}$NiO${}_2$, we observe superconductivity with a transition temperature of 7-12 K, and robust critical current density at 2 K of 334 kA/cm${}^2$. These findings indicate that superconductivity in the infinite layer nickelates is relatively insensitive to the details of the rare earth 4$f$ configuration. Furthermore, they motivate the exploration of a broader family of compounds based on two-dimensional NiO${}_2$ planes, which will enable systematic investigation of the superconducting and normal state properties and their underlying mechanisms.

19 pages, 4 figures

References in corpus (2)

• Role of $4f$ states in infinite-layer NdNiO${}_2$
• Roles of Critical Valence Fluctuations in Ce- and Yb-Based Heavy Fermion Metals

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• Infinite-layer nickelate superconductors: A current experimental perspective of the crystal and electronic structures
• Electronic structure and magnetic properties of higher-order layered nickelates: La${}_{n+1}$Ni${}_n$O${}_{2n+2}$ ($n=4-6$)
• Superconductivity and Antiferromagnetism in NdNiO${}_2$ and CaCuO${}_2$: A Cluster DMFT Study
• Limits to the strain engineering of layered square-planar nickelate thin films
• Correlated interface electron gas in infinite-layer nickelate versus cuprate films on SrTiO${}_3$(001)
• Stability of Superconducting Nd0.8Sr0.2NiO2 Thin Films
• Oxygen vacancy induced site-selective mott transition in lanio3
• Negligible oxygen vacancies, low critical current density, electric-field modulation, in-plane anisotropic and high-field transport of a superconducting Nd0.8Sr0.2NiO2/SrTiO3 heterostructure
• Investigation of hydrogen incorporations in bulk infinite-layer nickelates
• Electronic structure of higher-order Ruddlesden-Popper nickelates
• Resistive transition of hydrogen-rich superconductors
• Emergent flat-band physics in $d^{9-\delta }$ multilayer nickelates
• Single-layer T'-type nickelates: Ni${}^{1+}$ is Ni${}^{1+}$
• Stabilization of singlet hole-doped state in infinite-layer nickelate superconductors
• Topotactically induced oxygen vacancy order in nickelate single crystals
• Two-orbital model for possible superconductivity pairing mechanism in nickelates
• Thin-film aspects of superconducting nickelates
• Observation of Coulomb blockade and Coulomb staircases in superconducting Pr0.8Sr0.2NiO2 films
• Conductivity of infinite-layer NdNiO${}_2$ as a probe of spectator bands
• Resonant inelastic x-ray scattering data for Ruddlesden-Popper and reduced Ruddlesden-Popper nickelates
• Electronic Correlations and Absence of Superconductivity in the Collapsed Phase of LaFe${}_2$As${}_2$
• Intrinsic coherence length anisotropy in nickelate, and some pnictide, and chalcogenide superconductors