Charge and spin order dichotomy in NdNiO${}_2$ driven by SrTiO${}_3$ capping layer

Abstract

Superconductivity in infinite-layer nickelates holds exciting analogies with that of cuprates, with similar structures and $3d$-electron count. Using resonant inelastic x-ray scattering (RIXS) we studied electronic and magnetic excitations and charge density correlations in Nd${}_{1-x}$Sr${}_x$NiO${}_2$ thin films with and without an SrTiO${}_3$ capping layer. We observe dispersing magnons only in the capped samples, progressively dampened at higher doping. In addition, we detect an elastic resonant scattering peak in the uncapped $x=0$ compound at wave vector (1/3,0), remindful of the charge order signal in hole doped cuprates. The peak weakens at $x=0.05$ and disappears in the superconducting $x=0.20$ film. The uncapped samples also present a higher degree of Ni$3d$-Nd$5d$ hybridization and a smaller anisotropy of the Ni$3d$ occupation with respect to the capped samples. The role of the capping on the possible hydrogen incorporation or on other mechanisms responsible for the electronic reconstruction far from the interface remains to be understood.

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Cited by in corpus (58)

• Character of the "normal state" of the nickelate superconductors
• 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
• Superconducting Instabilities in Strongly-Correlated Infinite-Layer Nickelates
• Reconstructing the polar interface of infinite-layer nickelate thin films
• Absence of $3a_0$ Charge Density Wave Order in the Infinite Layer Nickelates
• Evidence for quasi-two-dimensional superconductivity in infinite-layer nickelates
• Trilayer multi-orbital models of $\mathrm{L}{\mathrm{a}}_4\mathrm{N}{\mathrm{i}}_3{\mathrm{O}}_{10}$
• Charge and spin instabilities in superconducting La${}_3$Ni${}_2$O${}_7$
• Exploring Quantum Materials with Resonant Inelastic X-Ray Scattering
• Charge distribution across capped and uncapped infinite-layer neodymium nickelate thin films
• Rotational symmetry breaking in superconducting nickelate Nd0.8Sr0.2NiO2 films
• Electronic structure and magnetic correlations in trilayer nickelate superconductor La${}_4$Ni${}_3$O${}_{10}$ under pressure
• Synthesis of infinite-layer nickelates and influence of the capping-layer on magnetotransport
• Synthesis and physical properties of LaNiO${}_2$ crystals
• Superconductivity in PrNiO2 infinite-layer nickelates
• Two-gap superconductivity and decisive role of rare-earth $d$ electrons in infinite-layer nickelates
• An electronic origin of charge order in infinite-layer nickelates
• Superconductivity in freestanding infinite-layer nickelate membranes
• On the origin of topotactic reduction effect for superconductivity in infinite-layer nickelates
• Synthesis of thin film infinite-layer nickelates by atomic hydrogen reduction: clarifying the role of the capping layer
• Topotactic-hydrogen forms chains in $AB$O${}_2$ nickelate superconductors
• Pressure-dependent Electronic Superlattice in the Kagome-Superconductor CsV${}_3$Sb${}_5$
• Spin-density, charge- and bond-disproportionation wave instability in hole-doped infinite-layer $R$NiO${}_2$
• Superconductivity in the parent infinite-layer nickelate NdNiO${}_2$
• Quantifying interaction mechanism in infinite layer nickelate superconductors
• Charge Density Wave Ordering in NdNiO${}_2$: Effects of Multiorbital Nonlocal Correlations
• Antiferromagnetic fluctuations and a dominant $d_{xy}$-wave pairing symmetry in nickelate-based superconductors
• Investigation of spin excitations and charge order in bulk crystals of the infinite-layer nickelate LaNiO${}_2$
• Electronic character of charge order in square planar low valence nickelates
• Comparative study of charge order in undoped infinite-layer nickelate superconductors
• 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
• Unusual Hole-doping-dependent Electronic Instability and Electron-Phonon Coupling in Infinite-layer Nickelates
• Two Distinct Charge Orders in Infinite-layer PrNiO2+δ revealed by Resonant X-ray Diffraction
• Unraveling p-type and n-type interfaces in Superconducting Infinite-Layer Nickelate thin films
• Emergent electronic landscapes in a novel valence-ordered nickelate with tri-component nickel coordination
• Possible structural quantum criticality tuned by rare-earth ion substitution in infinite-layer nickelates
• Low-energy plasmon excitations in infinite-layer nickelates
• Interplay between electron correlations, magnetic state, and structural confinement in LaNiO3 ultrathin films
• Signatures of canted antiferromagnetism in infinite-layer nickelates studied by x-ray magnetic dichroism
• An emerging global picture of heavy fermion physics
• Observation of Electride-like $s$ States Coexisting with Correlated $d$ Electrons in NdNiO${}_2$
• Resonant inelastic x-ray scattering data for Ruddlesden-Popper and reduced Ruddlesden-Popper nickelates
• Capping effects on spin and charge excitations in parent and superconducting Nd1-xSrxNiO2
• The emergence of antiferromagnetic correlations and Kondo-like features in a two-band model for infinite-layer nickelates
• Three-dimensional bond-order instability in infinite-layer nickelates due to nonlocal quantum interference
• Lattice-charge coupling in a trilayer nickelate with intertwined density wave order
• Influence of $f$ Electrons on the Electronic Band Structure of Rare-Earth Nickelates
• Electronic correlations and spin-charge-density stripes in double-layer La${}_3$Ni${}_2$O${}_7$
• Lattice dynamics of the infinite-layer nickelate LaNiO${}_2$
• Oxygen sublattice disorder and valence state modulation in infinite-layer nickelate superlattices
• Systematic evolution of superconducting pairing strength and Seebeck coefficients in correlated infinite-layer La${}_{1-x}$Sr${}_x$NiO${}_2$
• 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${}_2$
• Superconducting phase diagram of multi-layer square-planar nickelates
• Emergence and tunability of Fermi-pocket and electronic instabilities in layered Nickelates
• Dual role of stripe phase on superconducting correlation in a bilayer square lattice