Doping evolution of the Mott-Hubbard landscape in infinite-layer nickelates

Abstract

The recent observation of superconductivity in Nd${}_{0.8}$Sr${}_{0.2}$NiO${}_2$ has raised fundamental questions about the hierarchy of the underlying electronic structure. Calculations suggest that this system falls in the Mott-Hubbard regime, rather than the charge-transfer configuration of other nickel oxides and the superconducting cuprates. Here, we use state-of-the-art, locally-resolved electron energy loss spectroscopy to directly probe the Mott-Hubbard character of Nd${}_{1-x}$Sr${}_x$NiO${}_2$. Upon doping, we observe emergent hybridization reminiscent of the Zhang-Rice singlet via the oxygen-projected states, modification of the Nd 5$d$ states, and the systematic evolution of Ni 3$d$ hybridization and filling. These results clearly evidence the multiband nature of this system and the distinct electronic landscape for infinite-layer nickelates despite their formal similarity to the cuprates.

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Cited by in corpus (96)

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• Superconductivity in a quintuple-layer square-planar nickelate
• Visualization of Oxygen Vacancies and Self-doped Ligand Holes in La3Ni2O7-δ
• Superconductivity in infinite-layer nickelate La${}_{1-x}$Ca${}_x$NiO${}_2$ thin films
• Two superconducting components with different symmetries in Nd1-xSrxNiO2 films
• Character of the "normal state" of the nickelate superconductors
• Superconductivity in infinite-layer nickelates
• Pressure-induced monotonic enhancement of Tc to over 30 K in the superconducting Pr0.82Sr0.18NiO2 thin films
• Charge density waves in infinite-layer NdNiO${}_2$ nickelates
• Correlated electronic structure, orbital-selective behavior, and magnetic correlations in double-layer La${}_3$Ni${}_2$O${}_7$ under pressure
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• Normal and superconducting properties of La${}_3$Ni${}_2$O${}_7$
• Intrinsic magnetism in superconducting infinite-layer nickelates
• Orbital and Spin Character of Doped Carriers in Infinite-Layer Nickelates
• Isotropic Pauli-Limited Superconductivity in the Infinite Layer Nickelate Nd${}_{0.775}$Sr${}_{0.225}$NiO${}_2$
• Observation of perfect diamagnetism and interfacial effect on the electronic structures in Nd0.8Sr0.2NiO2 superconducting infinite layers
• Topotactic transformation of single-crystals: from perovskite to infinite-layer nickelates
• Strong Superexchange in a $d^{9-\delta }$ Nickelate Revealed by Resonant Inelastic X-Ray Scattering
• Superconductivity in nickel based 112 systems
• XY magnetism, Kitaev exchange, and long-range frustration in the $J_{\mathrm{eff}}=1/2$ honeycomb cobaltates
• Optical properties of the infinite-layer La${}_{1-x}$Sr${}_x$NiO${}_2$ and hidden Hund's physics
• Superconducting Instabilities in Strongly-Correlated Infinite-Layer Nickelates
• Reconstructing the polar interface of infinite-layer nickelate thin films
• Magnetic correlations in infinite-layer nickelates: an experimental and theoretical multi-method study
• Absence of $3a_0$ Charge Density Wave Order in the Infinite Layer Nickelates
• Angle-resolved photoemission spectroscopy of superconducting (La,Pr)3Ni2O7/SrLaAlO4 heterostructures
• Dynamical Mean Field Studies of Infinite Layer Nickelates: Physics Results and Methodological Implications
• Preparation of superconducting thin films of infinite-layer nickelate Nd${}_{0.8}$Sr${}_{0.2}$NiO${}_2$
• Electronic structure of superconducting nickelates probed by resonant photoemission spectroscopy
• Doping-dependent character and possible magnetic ordering of NdNiO${}_2$
• Impact of Cation Stoichiometry on the Crystalline Structure and Superconductivity in Nickelates
• Cuprate-like Electronic Structures in Infinite-Layer Nickelates with Substantial Hole Dopings
• Topotactic Transition: A Promising Opportunity for Creating New Oxides
• Electronic correlations and magnetic interactions in infinite-layer NdNiO${}_2$
• Physical properties revealed by transport measurements on superconducting Nd${}_{0.8}$Sr${}_{0.2}$NiO${}_2$ thin films
• Electronic Structure of Superconducting Infinite-Layer Lanthanum Nickelates
• Resolving the Electronic Ground State of La3Ni2O7-δ Films
• Experimental Progress on the Emergent Infinite-Layer Ni-Based Superconductors
• Electronic structure and magnetic properties of higher-order layered nickelates: La${}_{n+1}$Ni${}_n$O${}_{2n+2}$ ($n=4-6$)
• Infinite-layer nickelate superconductors: A current experimental perspective of the crystal and electronic structures
• Charge distribution across capped and uncapped infinite-layer neodymium nickelate thin films
• Low Valence Nickelates: Launching the Nickel Age of Superconductivity
• Soft X-ray Spectroscopy of Low-Valence Nickelates
• Self-doping and the Mott-Kondo scenario for infinite-layer nickelate superconductors
• Stability of Superconducting Nd0.8Sr0.2NiO2 Thin Films
• Synthesis and physical properties of LaNiO${}_2$ crystals
• A Nickelate Renaissance
• Superconductivity in PrNiO2 infinite-layer nickelates
• Two-gap superconductivity and decisive role of rare-earth $d$ electrons in infinite-layer nickelates
• Optical read and write of spin states in organic diradicals
• Electronic structure of higher-order Ruddlesden-Popper nickelates
• An electronic origin of charge order in infinite-layer nickelates
• Role of Oxygen States in the Low Valence Nickelate La${}_4$Ni${}_3$O${}_8$
• Microscopic Theory of Superconducting Phase Diagram in Infinite-Layer Nickelates
• Hund physics landscape of two-orbital system
• Correlated electronic structure of a quintuple-layer nickelate
• Dynamical structural instability and its implication on the physical properties of infinite-layer nickelates
• Topotactic-hydrogen forms chains in $AB$O${}_2$ nickelate superconductors
• Spin-density, charge- and bond-disproportionation wave instability in hole-doped infinite-layer $R$NiO${}_2$
• Many-body electronic structure of $d^{9-\delta }$ layered nickelates
• Charge Density Wave Ordering in NdNiO${}_2$: Effects of Multiorbital Nonlocal Correlations
• Quantifying interaction mechanism in infinite layer nickelate superconductors
• Stabilization of singlet hole-doped state in infinite-layer nickelate superconductors
• Optical signature for distinguishing between Mott-Hubbard, intermediate and charge-transfer insulators
• Topotactically induced oxygen vacancy order in nickelate single crystals
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• Scanning SQUID study of ferromagnetism and superconductivity in infinite-layer nickelates
• Two-orbital model for possible superconductivity pairing mechanism in nickelates
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• Charge ordering as the driving mechanism for superconductivity in rare-earth nickel oxides
• Charge order and superconductivity in a minimal two-band model for infinite-layer nickelates
• Unraveling p-type and n-type interfaces in Superconducting Infinite-Layer Nickelate thin films
• Possible structural quantum criticality tuned by rare-earth ion substitution in infinite-layer nickelates
• Low-energy plasmon excitations in infinite-layer nickelates
• Electron-phonon mediated superconductivity in La${}_6$Ni${}_5$O${}_{12}$ nickel oxides
• Conductivity of infinite-layer NdNiO${}_2$ as a probe of spectator bands
• Magnetism-Enhanced Strong Electron-Phonon Coupling in Infinite-Layer Nickelate
• Proposal to improve Ni-based superconductors via enhanced charge transfer
• Disorder-induced suppression of superconductivity in infinite-layer nickelates
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• Capping effects on spin and charge excitations in parent and superconducting Nd1-xSrxNiO2
• A Broken Translational Symmetry State in an Infinite-Layer Nickelate
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• Upper critical fields in high-$T_{\mathrm{c}}$ superconductors
• Numerical study of bi-layer two-orbital model for La${}_3$Ni${}_2$O${}_7$ on a plaquette ladder
• Lattice dynamics of the infinite-layer nickelate LaNiO${}_2$
• Pressure effects on the electronic structure and magnetic properties of infinite-layer nickelates
• Superconducting phase diagram of multi-layer square-planar nickelates
• Intrinsic coherence length anisotropy in nickelate, and some pnictide, and chalcogenide superconductors
• Discovery of Giant Unit-Cell Super-Structure in the Infinite-Layer Nickelate PrNiO${}_2$
• Magnetic excitations in infinite-layer nickelates
• Re-entrant unconventional superconductivity induced by rare-earth substitution in Nd1-xEuxNiO2 thin films
• Systematic evolution of superconducting pairing strength and Seebeck coefficients in correlated infinite-layer La${}_{1-x}$Sr${}_x$NiO${}_2$