Electronic character of charge order in square planar low valence nickelates

Abstract

Charge order is a central feature of the physics of cuprate superconductors and is known to arise from a modulation of holes with primarily oxygen character. Low-valence nickelate superconductors also host charge order, but the electronic character of this symmetry breaking is unsettled. Here, using resonant inelastic x-ray scattering at the Ni $L_2$-edge, we identify intertwined involvements of Ni $3d_{x^2-y^2}$, $3d_{3z^2-r^2}$, and O $2p_{\sigma }$ orbitals in the formation of diagonal charge order in an overdoped low-valence nickelate La${}_4$Ni${}_3$O${}_8$. The Ni $3d_{x^2-y^2}$ orbitals, strongly hybridized with planar O $2p_{\sigma }$, largely shape the spatial charge distribution and lead to Ni site-centered charge order. The $3d_{3z^2-r^2}$ orbitals play a small, but non-negligible role in the charge order as they hybridize with the rare-earth $5d$ orbitals. Our results reveal that the low-energy physics and ground-state character of these nickelates are more complex than those in cuprates.

arXiv commentAccepted in Physical Review X; 7 pages plus references and supplementary materials

References in corpus (50)

• A Common Thread: the pairing interaction for the unconventional superconductors
• Electronic Liquid Crystal Phases of a Doped Mott Insulator
• Theory of Intertwined Orders in High Temperature Superconductors
• Spin-Gap Proximity Effect Mechanism of High Temperature Superconductivity
• Stripe order in the underdoped region of the two-dimensional Hubbard model
• Competing states in the t-J model: uniform d-wave state versus stripe state
• Multiplet ligand-field theory using Wannier orbitals
• Singular quasiparticle scattering in the proximity of charge instabilities
• The Challenge of Unconventional Superconductivity
• Spatially modulated "Mottness" in La2-xBaxCuO4
• Resonant x-ray scattering studies of charge order in cuprates
• Superconducting Dome in Nd${}_{1-x}$Sr${}_x$NiO${}_2$ Infinite Layer Films
• Phase diagram and superconducting dome of infinite-layer $\mathrm{N}{\mathrm{d}}_{1-\mathrm{x}}\mathrm{S}{\mathrm{r}}_{\mathrm{x}}\mathrm{Ni}{\mathrm{O}}_2$ thin films
• Two-Dimensional Superconducting Fluctuations in Stripe-Ordered La(1.875)Ba(0.125)CuO(4)
• Dynamical layer decoupling in a stripe-ordered, high T_c superconductor
• A superconducting praseodymium nickelate with infinite layer structure
• Nickelate superconductivity without rare-earth magnetism: (La,Sr)NiO${}_2$
• Distinct Charge Orders in the Planes and Chains of Ortho-III-Ordered YBa${}_2$Cu${}_3$O${}_{6+\delta }$ Superconductors Identified by Resonant Elastic X-ray Scattering
• Superconductivity in infinite-layer nickelate La${}_{1-x}$Ca${}_x$NiO${}_2$ thin films
• Numerical evidence of fluctuating stripes in the normal state of high-Tc cuprate superconductors
• Mimicking cuprates: large orbital polarization in a metallic square-planar nickelate
• Phase Diagram of Infinite Layer Praseodymium Nickelate Pr${}_{1-x}$Sr${}_x$NiO${}_2$ Thin Films
• Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high-Tc superconductor
• Theory of Resonant Inelastic X-ray Scattering by Collective Magnetic Excitations
• Energy and symmetry of $dd$ excitations in undoped layered cuprates measured by Cu $L_3$ resonant inelastic x-ray scattering
• Charge density waves in infinite-layer NdNiO${}_2$ nickelates
• Re-entrant charge order in overdoped (Bi,Pb)${}_{2.12}$Sr${}_{1.88}$CuO${}_{6+\delta }$ outside the pseudogap regime
• Charge and spin order dichotomy in NdNiO${}_2$ driven by SrTiO${}_3$ capping layer
• Stacked Charge Stripes in Quasi-Two_Dimensional Trilayer Nickelate La4Ni3O8
• Charge density waves in cuprate superconductors beyond the critical doping
• Charge ordering in superconducting copper oxides
• Strong Superexchange in a $d^{9-\delta }$ Nickelate Revealed by Resonant Inelastic X-Ray Scattering
• Intertwined spin, charge and pair correlations in the two-dimensional Hubbard model in the thermodynamic limit
• Spectroscopy of stripe order in La1.8Sr0.2NiO4 using resonant soft x-ray diffraction
• Spins, Stripes, and Superconductivity in Hole-Doped Cuprates
• Multi-orbital charge density wave excitations and concomitant phonon anomalies in Bi${}_2$Sr${}_2$LaCuO${}_{6+\delta }$
• Neutron scattering studies on stripe phases in non-cuprate materials
• Comparative Many-Body Study of Pr${}_4$Ni${}_3$O${}_8$ and NdNiO${}_2$
• Doping Dependence of Collective Spin and Orbital Excitations in Spin 1 Quantum Antiferromagnet La${}_{2-x}$Sr${}_x$NiO${}_4$ Observed by X-rays
• EDRIXS: An open source toolkit for simulating spectra of resonant inelastic x-ray scattering
• Theoretical investigation of superconductivity in trilayer square-planar nickelates
• Resonant X-Ray Scattering Measurements of a Spatial Modulation of the Cu 3d and O 2p Energies in Stripe-Ordered Cuprate Superconductors
• Core-Level X-Ray Spectroscopy of Infinite-Layer Nickelate: LDA+DMFT Study
• Electronic structure and magnetic properties of higher-order layered nickelates: La${}_{n+1}$Ni${}_n$O${}_{2n+2}$ ($n=4-6$)
• Diagonal static spin correlation in the low temperature orthorhombic Pccn phase of La1.55Nd0.4Sr0.05CuO4
• Incommensurate Spin Ordering and Fluctuations in underdoped La_{2-x}Ba_{x}CuO_{4}
• Evolution of the density of states at EF of Bi2-yPbySr2-xLaxCuO6+d and Bi2Sr2-xLaxCuO6+d cuprates with hole doping
• Role of Oxygen States in the Low Valence Nickelate La${}_4$Ni${}_3$O${}_8$
• Symmetry of the charge density wave in cuprates
• Superconductivity from charge order in cuprates

Cited by in corpus (6)

• Exploring Quantum Materials with Resonant Inelastic X-Ray Scattering
• Orbital polarization, charge transfer, and fluorescence in reduced valence nickelates
• Softening of $dd$ excitation in the resonant inelastic x-ray scattering spectra as a signature of Hund's coupling in nickelates
• Magnetic excitations in Nd${}_{n+1}$Ni${}_n$O${}_{3n+1}$ Ruddlesden-Popper nickelates observed via resonant inelastic x-ray scattering
• Superconducting phase diagram of multi-layer square-planar nickelates
• Observation of correlated plasmons in low-valence nickelates