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

References in corpus (3)

• Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
• Physics of ultrathin films and heterostructures of rare earth nickelates
• Nickelate superconductors $--$ Multiorbital nature and spin freezing

Cited by in corpus (121)

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• Electronic correlations and superconducting instability in La${}_3$Ni${}_2$O${}_7$ under high pressure
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• Two superconducting components with different symmetries in Nd1-xSrxNiO2 films
• Evidence for charge and spin order in single crystals of La${}_3$Ni${}_2$O${}_7$ and La${}_3$Ni${}_2$O${}_6$
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• Electronic structure of rare-earth infinite-layer ReNiO2 (Re=La, Nd)
• Flat bands promoted by Hund's rule coupling in the candidate double-layer high-temperature superconductor La${}_3$Ni${}_2$O${}_7$
• Hund's metal physics: from SrNiO${}_2$ to NdNiO${}_2$
• Charge Transfer and Zhang-Rice Singlet Bands in the Nickelate Superconductor $\mathrm{L}{\mathrm{a}}_3\mathrm{N}{\mathrm{i}}_2{\mathrm{O}}_7$ under Pressure
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• Multiorbital processes rule the Nd${}_{1-x}$Sr${}_x$NiO${}_2$ normal state
• Isotropic Pauli-Limited Superconductivity in the Infinite Layer Nickelate Nd${}_{0.775}$Sr${}_{0.225}$NiO${}_2$
• Distinct pairing symmetries of superconductivity in infinite-layer nickelates
• Materials design of dynamically stable $d^9$ layered nickelates
• Strong Superexchange in a $d^{9-\delta }$ Nickelate Revealed by Resonant Inelastic X-Ray Scattering
• Calculated Exchange Interactions and Sensitivity of Ni Two-Hole Spin State to Hund's Coupling in Doped NdNiO2
• 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
• $f$-electron and magnetic ordering effects in nickelates LaNiO${}_2$ and NdNiO${}_2$: remarkable role of the cuprate-like $3d_{x^2-y^2}$ band
• Effective model and pairing tendency in bilayer Ni-based superconductor La${}_3$Ni${}_2$O${}_7$
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• Phase diagram of nickelate superconductors calculated by dynamical vertex approximation
• Magnetic correlations in infinite-layer nickelates: an experimental and theoretical multi-method study
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• Electronic structure and magnetism in infinite-layer nickelates RNiO${}_2$ (R= La-Lu)
• Dynamical Mean Field Studies of Infinite Layer Nickelates: Physics Results and Methodological Implications
• Nickelate superconductors: an ongoing dialog between theory and experiments
• 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${}_2$
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• Trilayer multi-orbital models of $\mathrm{L}{\mathrm{a}}_4\mathrm{N}{\mathrm{i}}_3{\mathrm{O}}_{10}$
• Optimizing superconductivity: from cuprates via nickelates to palladates
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• Doping dependence of electronic structure of infinite-layer NdNiO2
• Magnetic exchange coupling in cuprate-analog $d^9$ nickelates
• Intrinsic Spin Susceptibility and Pseudogap-like Behavior in Infinite-Layer LaNiO2
• Physical properties revealed by transport measurements on superconducting Nd${}_{0.8}$Sr${}_{0.2}$NiO${}_2$ thin films
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• Correlations turn electronic structure of finite-layer nickelates upside down
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• Infinite-layer nickelate superconductors: A current experimental perspective of the crystal and electronic structures
• Experimental Progress on the Emergent Infinite-Layer Ni-Based Superconductors
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• Soft X-ray Spectroscopy of Low-Valence Nickelates
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• Strain-induced enhancement of $T_c$ in infinite-layer Pr${}_{0.8}$Sr${}_{0.2}$NiO${}_2$ films
• Self-doping and the Mott-Kondo scenario for infinite-layer nickelate superconductors
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• Dynamical structural instability and its implication on the physical properties of infinite-layer nickelates
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• Intertwined charge and spin instability of La${}_3$Ni${}_2$O${}_7$
• Possible structural quantum criticality tuned by rare-earth ion substitution in infinite-layer nickelates
• An emerging global picture of heavy fermion physics
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