Superconducting phase diagram of multi-layer square-planar nickelates

Abstract

The discovery of superconductivity in square-planar nickelates has offered a rich materials platform to explore the origins of cuprate-like superconductivity. Experimental investigations however have largely been limited to the infinite-layer $R$NiO${}_2$ ($R$=rare-earth) nickelates. Here, we construct a phase diagram of multi-layer square-planar Nd${}_{n+1}$Ni${}_n$O${}_{2n+2}$ compounds and discover signatures of superconductivity for $n$ = 4 - 8. Upon decreasing the dimensionality $n$, the superconducting anisotropy evolves due to 4$f$ electron effects, and electronic structure characteristics approach cuprate-like behavior. Magnetic fluctuations persist from within the superconducting regime and into the over-doped, non-superconducting regime. Remarkably, the superconducting regime overlaps with that of chemically-doped infinite-layer nickelates, demonstrating underlying commonalities and distinct differences across varying structural realizations of square-planar nickelates. Our work establishes this layered template for creating new nickel-based superconductors.

13 pages, 5 figures

References in corpus (71)

• Long-range incommensurate charge fluctuations in (Y,Nd)Ba2Cu3O(6+x)
• Superconductivity near 80 Kelvin in single crystals of La3Ni2O7 under pressure
• Twisted Hubbard Model for Sr2IrO4: Magnetism and Possible High Temperature Superconductivity
• Intense paramagnon excitations in a large family of high-temperature superconductors
• Superconducting Dome in Nd${}_{1-x}$Sr${}_x$NiO${}_2$ Infinite Layer Films
• Electronic structure of the parent compound of superconducting infinite-layer nickelates
• Phase diagram and superconducting dome of infinite-layer $\mathrm{N}{\mathrm{d}}_{1-\mathrm{x}}\mathrm{S}{\mathrm{r}}_{\mathrm{x}}\mathrm{Ni}{\mathrm{O}}_2$ thin films
• Infinite Layer LaNiO(2): Ni(1+)is not Cu(2+)
• A superconducting praseodymium nickelate with infinite layer structure
• Nickelate superconductivity without rare-earth magnetism: (La,Sr)NiO${}_2$
• Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal
• Self-doped Mott insulator for parent compounds of nickelate superconductors
• Superconductivity in infinite-layer nickelate La${}_{1-x}$Ca${}_x$NiO${}_2$ thin films
• Similarities and differences between infinite-layer nickelates and cuprates and implications for superconductivity
• Late transition-metal oxides with infinite-layer structure: Nickelates versus cuprates
• 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
• Energy and symmetry of $dd$ excitations in undoped layered cuprates measured by Cu $L_3$ resonant inelastic x-ray scattering
• Absence of superconductivity in bulk Nd${}_{1-x}$Sr${}_x$NiO${}_2$
• A Systematic Study of Electron-Phonon Coupling to Oxygen Modes Across the Cuprates
• Evidence for nodal quasiparticles in electron-doped cuprates from penetration depth measurements
• Character of the "normal state" of the nickelate superconductors
• Superconductivity in the antiperovskite Dirac-metal oxide Sr${}_3$SnO
• Charge density waves in infinite-layer NdNiO${}_2$ nickelates
• Influence of apical oxygen on the extent of in-plane exchange interaction in cuprate superconductors
• Intertwined density waves in a metallic nickelate
• Charge and spin order dichotomy in NdNiO${}_2$ driven by SrTiO${}_3$ capping layer
• Intrinsic magnetism in superconducting infinite-layer nickelates
• Orbital and Spin Character of Doped Carriers in Infinite-Layer Nickelates
• Electronic Structure Trends Across the Rare-Earth Series in Superconducting Infinite Layer Nickelates
• Isotropic Pauli-Limited Superconductivity in the Infinite Layer Nickelate Nd${}_{0.775}$Sr${}_{0.225}$NiO${}_2$
• Directly characterizing the relative strength and momentum dependence of electron-phonon coupling using resonant inelastic x-ray scattering
• Topotactic transformation of single-crystals: from perovskite to infinite-layer nickelates
• Observation of perfect diamagnetism and interfacial effect on the electronic structures in Nd0.8Sr0.2NiO2 superconducting infinite layers
• High oxygen pressure floating zone growth and crystal structure of the layered nickelates R${}_4$Ni${}_3$O${}_{10}$ (R=La, Pr)
• Strong Superexchange in a $d^{9-\delta }$ Nickelate Revealed by Resonant Inelastic X-Ray Scattering
• Experimental Determination of Momentum-Resolved Electron-Phonon Coupling
• Nature of the charge-density wave excitations in cuprates
• Observation of small Fermi pockets protected by clean CuO2 sheets of a high-Tc superconductor
• Absence of $3a_0$ Charge Density Wave Order in the Infinite Layer Nickelates
• Electronic Origin of High-Tc Maximization and Persistence in Trilayer Cuprate Superconductors
• Paramagnons and high-temperature superconductivity in mercury-based cuprates
• Impact of Cation Stoichiometry on the Crystalline Structure and Superconductivity in Nickelates
• Doping Dependence of Collective Spin and Orbital Excitations in Spin 1 Quantum Antiferromagnet La${}_{2-x}$Sr${}_x$NiO${}_4$ Observed by X-rays
• Enhanced electron-phonon coupling for charge-density-wave formation in La${}_{1.8-x}$Eu${}_{0.2}$Sr${}_x$CuO${}_{4+\delta }$
• Determining the Electron-Phonon Coupling in Superconducting Cuprates by Resonant Inelastic X-ray Scattering: Methods and Results on Nd${}_{1+x}$Ba${}_{2-x}$Cu${}_3$O${}_{7-\delta }$
• Effects of Sr-doping on the electronic and spin-state properties of infinite-layer nickelates
• Antiferromagnetic metal phase in an electron-doped rare-earth nickelate
• Correlations turn electronic structure of finite-layer nickelates upside down
• Charge distribution across capped and uncapped infinite-layer neodymium nickelate thin films
• Electronic structure and magnetic properties of higher-order layered nickelates: La${}_{n+1}$Ni${}_n$O${}_{2n+2}$ ($n=4-6$)
• Synthesis and electronic properties of Nd${}_{n+1}$Ni${}_n$O${}_{3n+1}$ Ruddlesden-Popper nickelate thin films
• Limits to the strain engineering of layered square-planar nickelate thin films
• Superconductivity in PrNiO2 infinite-layer nickelates
• Contrasting physical properties of the trilayer nickelates Nd${}_4$Ni${}_3$O${}_{10}$ and Nd${}_4$Ni${}_3$O${}_8$
• Role of Oxygen States in the Low Valence Nickelate La${}_4$Ni${}_3$O${}_8$
• Correlation between the tolerance factor and phase transition in Ln4-xLnxNi3O10 (Ln and Ln' = La, Pr and Nd; x = 0, 1, 2 and 3)
• Correlated electronic structure of a quintuple-layer nickelate
• Many-body electronic structure of $d^{9-\delta }$ layered nickelates
• Epitaxial Stabilization of Ultrathin Films of Rare-Earth Nickelates
• Superconductivity in the parent infinite-layer nickelate NdNiO${}_2$
• Large upper critical fields and dimensionality crossover of superconductivity in infinite-layer nickelate La${}_{0.8}$Sr${}_{0.2}$NiO${}_2$
• Atomic-scale mapping and quantification of local Ruddlesden-Popper phase variations
• Tunable disorder and localization in the rare-earth nickelates
• Electronic correlations, layer distinction, and electron doping in the alternating single-layer trilayer La${}_3$Ni${}_2$O${}_7$ polymorph
• Electronic character of charge order in square planar low valence nickelates
• Electronic band structure of a superconducting nickelate probed by the Seebeck coefficient in the disordered limit
• Orbital polarization, charge transfer, and fluorescence in reduced valence nickelates
• Conductivity of infinite-layer NdNiO${}_2$ as a probe of spectator bands
• Quantitative approaches for multi-scale structural analysis with atomic resolution electron microscopy