Doping-dependent character and possible magnetic ordering of NdNiO${}_2$

Abstract

The novel nickelate superconductors of infinite-layer type feature challenging electronic pecularities in the normal-state phase diagram with doping. Distinct many-body behavior and different dispersion regimes of the entangled $\{$Ni-$d_{z^2}$, Ni-$d_{x^2-y^2}$$\}$ orbital sector give rise to highly rich physics, which is here studied for the case of the NdNiO${}_2$ system. An analysis based on advanced realistic dynamical mean-field theory unveils that the superconducting hole-doped region is the meeting place of a (self-)doped Mott insulator from the underdoped side, and a bad Hund metal from the overdoped side. Fermi-level crossing of the Ni-$d_{z^2}$ flat-band ties both regimes together to form a singular arena for unconventional superconductivity. We furthermore shed light on the intriguing problem of elusive magnetism in infinite-layer nickelates. Antiferromagnetic (AFM) order with small Ni moments is shown to be a vital competitor at low temperature. At stoichiometry, C-AFM order with ferromagnetic spin-alignment along the $c$-axis benefits from a conceivable coexistence with Kondo(-lattice) screening.

14 pages, 12 figures

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• Superconducting Instabilities in Strongly-Correlated Infinite-Layer Nickelates
• Hund electronic correlation in La${}_3$Ni${}_2$O${}_7$ under high pressure
• Dynamical Mean Field Studies of Infinite Layer Nickelates: Physics Results and Methodological Implications
• Superconductivity and Antiferromagnetism in NdNiO${}_2$ and CaCuO${}_2$: A Cluster DMFT Study
• Role of Oxygen States in the Low Valence Nickelate La${}_4$Ni${}_3$O${}_8$
• Emergent flat-band physics in $d^{9-\delta }$ multilayer nickelates
• Dynamical structural instability and its implication on the physical properties of infinite-layer nickelates
• Spin-density, charge- and bond-disproportionation wave instability in hole-doped infinite-layer $R$NiO${}_2$
• Screening in a two-band model for superconducting infinite-layer nickelate
• Quantifying interaction mechanism in infinite layer nickelate superconductors
• Charge Density Wave Ordering in NdNiO${}_2$: Effects of Multiorbital Nonlocal Correlations
• Assessing the correlated electronic structure of lanthanum nickelates
• Single-layer T'-type nickelates: Ni${}^{1+}$ is Ni${}^{1+}$
• Closing in on possible scenarios for infinite-layer nickelates: comparison of dynamical mean-field theory with angular-resolved photoemission spectroscopy
• Variation of carrier density in semimetals via short-range correlation: A case study with nickelate NdNiO${}_2$
• Possible structural quantum criticality tuned by rare-earth ion substitution in infinite-layer nickelates
• Conductivity of infinite-layer NdNiO${}_2$ as a probe of spectator bands
• Signatures of canted antiferromagnetism in infinite-layer nickelates studied by x-ray magnetic dichroism
• Rashba spin-orbit coupling in infinite-layer nickelate films on SrTiO3(001) and KTaO3(001)
• Pressure effects on the electronic structure and magnetic properties of infinite-layer nickelates
• Quasiparticle approach to the transport in infinite-layer nickelates
• Intrinsic coherence length anisotropy in nickelate, and some pnictide, and chalcogenide superconductors
• Character of Doped Holes in Nd${}_{1-x}$Sr${}_x$NiO${}_2$