Self-doped Mott insulator for parent compounds of nickelate superconductors

Abstract

We propose the parent compound of the newly discovered superconducting nickelate Nd${}_{1-x}$Sr${}_x$NiO${}_2$ as a self-doped Mott insulator, in which the low-density Nd-$5d$ conduction electrons couple to localized Ni-3 electrons to form Kondo spin singlets at low temperatures. This proposal is motivated with our analyses of the reported resistivity and Hall coefficient data in the normal state, showing logarithmic temperature dependence at low temperatures. In the strong Kondo coupling limit, we derive a generalized $t$-$J$ model with both Kondo singlets and nickel holons moving through the lattice of otherwise nickel spin-1/2 background. The antiferromagnetic long-range order is therefore suppressed as observed in experiments. With Sr-doping, the number of holons on the nickel sites increases, giving rise to the superconductivity and a strange metal phase analogous to those in superconducting copper oxides.

5 pages, 2 figures

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Cited by in corpus (141)

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• Nickelate superconductivity without rare-earth magnetism: (La,Sr)NiO${}_2$
• Bilayer two-orbital model of La${}_3$Ni${}_2$O${}_7$ under pressure
• Superconductivity in infinite-layer nickelate La${}_{1-x}$Ca${}_x$NiO${}_2$ thin films
• The critical nature of the Ni spin state in doped NdNiO${}_2$
• Late transition-metal oxides with infinite-layer structure: Nickelates versus cuprates
• Electronic correlations and superconducting instability in La${}_3$Ni${}_2$O${}_7$ under high pressure
• Nickelate superconductors -- a renaissance of the one-band Hubbard model
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• Effective bi-layer model Hamiltonian and density-matrix renormalization group study for the high-Tc superconductivity in La${}_3$Ni${}_2$O${}_7$ under high pressure
• Evidence for charge and spin order in single crystals of La${}_3$Ni${}_2$O${}_7$ and La${}_3$Ni${}_2$O${}_6$
• Nickelate superconductors $--$ Multiorbital nature and spin freezing
• Absence of superconductivity in bulk Nd${}_{1-x}$Sr${}_x$NiO${}_2$
• Topotactic hydrogen in nickelate superconductors and akin infinite-layer oxides ABO2
• Many-body Electronic Structure of NdNiO${}_2$ and CaCuO${}_2$
• Character of the "normal state" of the nickelate superconductors
• A substantial hybridization between correlated Ni-d orbital and itinerant electrons in infinite-layer nickelates
• Superconductivity in infinite-layer nickelates
• Pressure-induced monotonic enhancement of Tc to over 30 K in the superconducting Pr0.82Sr0.18NiO2 thin films
• Role of $4f$ states in infinite-layer NdNiO${}_2$
• Electronic structure of rare-earth infinite-layer ReNiO2 (Re=La, Nd)
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• Hund's metal physics: from SrNiO${}_2$ to NdNiO${}_2$
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• Orbital and Spin Character of Doped Carriers in Infinite-Layer Nickelates
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• Superconductivity in nickel based 112 systems
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• Optical properties of the infinite-layer La${}_{1-x}$Sr${}_x$NiO${}_2$ and hidden Hund's physics
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• Fluctuation-frustrated flat band instabilities in NdNiO2
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• NMR Evidence of Antiferromagnetic Spin Fluctuations in Nd${}_{0.85}$Sr${}_{0.15}$NiO${}_2$
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• Physical properties revealed by transport measurements on superconducting Nd${}_{0.8}$Sr${}_{0.2}$NiO${}_2$ thin films
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• Experimental Progress on the Emergent Infinite-Layer Ni-Based Superconductors
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• Recent progress in nickelate superconductors
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• Charge-stripe Fluctuations in Nd${}_4$Ni${}_3$O${}_8$ as Evidenced by Optical Spectroscopy
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• Correlation-temperature phase diagram of prototypical infinite layer rare earth nickelates
• Realization of Kagome Kondo lattice
• Proposed ordering of textured spin singlets in a bulk infinite layer nickelate
• Assessing the correlated electronic structure of lanthanum nickelates
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• Magnetism in doped infinite-layer NdNiO2 studied by combined density functional theory and dynamical mean-field theory
• Comparative study of charge order in undoped infinite-layer nickelate superconductors
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• Closing in on possible scenarios for infinite-layer nickelates: comparison of dynamical mean-field theory with angular-resolved photoemission spectroscopy
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• Intertwined charge and spin instability of La${}_3$Ni${}_2$O${}_7$
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• Possible structural quantum criticality tuned by rare-earth ion substitution in infinite-layer nickelates
• Observation of Electride-like $s$ States Coexisting with Correlated $d$ Electrons in NdNiO${}_2$
• Proposal to improve Ni-based superconductors via enhanced charge transfer
• An emerging global picture of heavy fermion physics
• The emergence of antiferromagnetic correlations and Kondo-like features in a two-band model for infinite-layer nickelates
• Energy-scale cascade and correspondence between Mott and Kondo lattice physics
• $\text{Ab initio}$ Materials Design of Superconductivity in $d^9$ Nickelates
• Topotactical Hydrogen Induced Single-Band $d$-wave Superconductivity in La${}_2$NiO${}_4$
• Numerical study of bi-layer two-orbital model for La${}_3$Ni${}_2$O${}_7$ on a plaquette ladder
• Theory of $(s+id)$ pairing in mixed-valent correlated metals
• Superconducting phase diagram of finite-layer nickelates Nd${}_{n+1}$Ni${}_n$O${}_{2n+2}$
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• Magnetic excitations in infinite-layer nickelates
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• Experimental electronic phase diagram in a diamond-lattice antiferromagnetic system
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• Emergence and tunability of Fermi-pocket and electronic instabilities in layered Nickelates
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• Interplay of orbital-selective Mott criticality and flat-band physics in La${}_3$Ni${}_2$O${}_6$
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