A Nickelate Renaissance

Abstract

The 2019 discovery of high temperature superconductivity in layered nickelate films, Nd${}_{1-x}$SrNiO${}_2$, has galvanized a community that has been studying nickelates for more than 30 years both as cuprate analogs and in their own right. On the surface, infinite layer nickelates, and their multilayer analogs, should be promising candidates based on our understanding of cuprates: square planar coordination and a parent d9 configuration that places a single hole in a dx2-y2 planar orbital makes nickelates seem poised for superconductivity. But creating crystals and films of sufficient quality of this d9 configuration in Ni1+ has proven to be a synthetic challenge, only recently overcome. These crystalline specimens are opening windows that shed new light on the cuprate-nickelate analogy and revealing nuances that leave the relationship between cuprates and nickelates very much an area open to debate further study. This Perspective gives a qualitative, phenomenological account of these newly discovered superconductors and multilayer members of the infinite layer nickelate family. The focus is on our current understanding of electronic and magnetic properties of these materials as well as some future opportunities, explored from the viewpoint of synthetic challenges and some suggested developments in materials discovery and growth to make further progress in this rejuvenated field.

References in corpus (30)

• Electronic structure of the parent compound of superconducting infinite-layer nickelates
• Infinite Layer LaNiO(2): Ni(1+)is not Cu(2+)
• Observation of a $d$-wave gap in electron-doped Sr${}_2$IrO${}_4$
• The critical nature of the Ni spin state in doped NdNiO${}_2$
• Mimicking cuprates: large orbital polarization in a metallic square-planar nickelate
• Doping evolution of the Mott-Hubbard landscape in infinite-layer nickelates
• Aspects of the Synthesis of Thin Film Superconducting Infinite-Layer Nickelates
• Stripe order at low temperatures in La{2-x}Sr{x}NiO4 for 1/3 < x < 1/2
• Absence of superconductivity in bulk Nd${}_{1-x}$Sr${}_x$NiO${}_2$
• Antiferromagnetic correlations in the metallic strongly correlated transition metal oxide LaNiO${}_3$
• Topotactic hydrogen in nickelate superconductors and akin infinite-layer oxides ABO2
• Role of $4f$ states in infinite-layer NdNiO${}_2$
• Synthesis and characterization of bulk Nd1-xSrxNiO2 and Nd1-xSrxNiO3
• Intertwined density waves in a metallic nickelate
• Neutron diffraction study of stripe order in La(2)NiO(4+d) with d=2/15
• Stacked Charge Stripes in Quasi-Two_Dimensional Trilayer Nickelate La4Ni3O8
• Bulk magnetic order in a two dimensional Ni1+/Ni2+ (d9/d8) nickelate, isoelectronic with superconducting cuprates
• High pressure floating-zone growth of perovskite nickelate LaNiO3 single crystals
• Strong Superexchange in a $d^{9-\delta }$ Nickelate Revealed by Resonant Inelastic X-Ray Scattering
• Spin stripe order in a square planar trilayer nickelate
• Tuning the van Hove singularities in AV${}_3$Sb${}_5$ (A = K, Rb, Cs) via pressure and doping
• Quantum Confinement Induced Molecular Mott Insulating State in La${}_4$Ni${}_3$O${}_8$
• Spin dynamics in stripe-ordered La5/3Sr1/3NiO4
• Complex magnetic order in nickelate slabs
• Charge ordering in Ni${}^{1+}$/Ni${}^{2+}$ nickelates: La${}_4$Ni${}_3$O${}_8$ and La${}_3$Ni${}_2$O${}_6$
• Synthesis of infinite-layer LaNiO2 films by metal-organic deposition
• Electron doped layered nickelates: spanning the phase diagram of the cuprates
• Comparative Many-Body Study of Pr${}_4$Ni${}_3$O${}_8$ and NdNiO${}_2$
• Raman spectroscopic evidence for multiferroicity in rare earth nickelate single crystals
• Charge-stripe order, antiferromagnetism, and spin dynamics in the cuprate-analog nickelate La${}_4$Ni${}_3$O${}_8$

Cited by in corpus (7)

• Emergent flat-band physics in $d^{9-\delta }$ multilayer nickelates
• Phase formation in hole- and electron-doped rare-earth nickelate single crystals
• Scanning SQUID study of ferromagnetism and superconductivity in infinite-layer nickelates
• Discovery of Giant Unit-Cell Super-Structure in the Infinite-Layer Nickelate PrNiO${}_2$
• Structural stability, electronic structure, and magnetic properties of the single-layer trilayer La3Ni2O7 polymorph
• Observation of surface superconductivity in bulk polycrystalline MoS2 induced by electric double-layer doping
• Re-entrant unconventional superconductivity induced by rare-earth substitution in Nd1-xEuxNiO2 thin films