Giant orbital polarization of Ni in square planar environment
arXiv:2009.02917 · doi:10.1103/PhysRevB.103.L060504
Abstract
Understanding the electronic behavior of Ni in a square planar environment of oxygen is the key to unravel the origin of the recently discovered superconductivity in the hole doped nickelate NdSrNiO. To identify the major similarities/dissimilarities between nickelate and cuprate superconductivity, the study of the electronic structure of Ni and Cu in an identical square planar environment is essential. In order to address these questions, we investigate the electronic structure of SrCuO and Ni doped SrCuO single crystals containing (Cu/Ni)O square planar units. Our polarization dependent X-ray absorption spectroscopy experiments for Ni in SrCuNiO have revealed very large orbital polarization, which is a characteristic feature of high cuprate. This arises due to the low spin =0 configuration with two holes in Ni 3 orbitals - in contrast to the expected high spin =1 state from Hund's first rule. The presence of such =0 Ni in hole doped nickelate would be analogous to the Zhang Rice singlet. However, the Mott Hubbard insulating nature of the NiO unit would point towards a different electronic phase space of nickelates, compared to high cuprates.
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References in corpus (46)
- Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
- A linear response approach to the calculation of the effective interaction parameters in the LDA+U method
- Theory of Intertwined Orders in High Temperature Superconductors
- Thermodynamics of Spin S = 1/2 Antiferromagnetic Uniform and Alternating-Exchange Heisenberg Chains
- Multiplet ligand-field theory using Wannier orbitals
- Orbital-assisted metal-insulator transition in VO
- Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
- Interface ferromagnetism and orbital reconstruction in BiFeO3- La0.7Sr0.3MnO3 heterostructures
- Superconducting Dome in NdSrNiO Infinite Layer Films
- Spin-Orbital Separation in the quasi 1D Mott-insulator Sr2CuO3
- Electronic structure of the parent compound of superconducting infinite-layer nickelates
- Phase diagram and superconducting dome of infinite-layer thin films
- Physics of ultrathin films and heterostructures of rare earth nickelates
- Turning a nickelate Fermi surface into a cuprate-like one through heterostructuring
- Orbital reflectometry
- Similarities and differences between infinite-layer nickelates and cuprates and implications for superconductivity
- The critical nature of the Ni spin state in doped NdNiO
- Late transition-metal oxides with infinite-layer structure: Nickelates versus cuprates
- Origin of interface magnetism in BiMnO3/SrTiO3 and LaAlO3/SrTiO3 heterostructures
- Mimicking cuprates: large orbital polarization in a metallic square-planar nickelate
- Doping evolution of the Mott-Hubbard landscape in infinite-layer nickelates
- Reduction of ordered moment and Neel temperature of quasi one-dimensional antiferromagnets Sr2CuO3 and Ca2CuO3
- Observation of spin current in quantum spin liquid
- Energy and symmetry of excitations in undoped layered cuprates measured by Cu resonant inelastic x-ray scattering
- Many-body Electronic Structure of NdNiO and CaCuO
- Covalent bonding and magnetism in cuprates
- Electronic structure of rare-earth infinite-layer ReNiO2 (Re=La, Nd)
- Strain and composition dependence of the orbital polarization in nickelate superlattices
- Two-band model for magnetism and superconductivity in nickelates
- Manifestation of spin-charge separation in the dynamic dielectric response of one--dimensional Sr2CuO3
- Orbital Selective Superconductivity in a Two-band Model of Infinite-Layer Nickelates
- Type II model in superconducting nickelate NdSrNiO
- Orbital control in strained ultra-thin LaNiO/LaAlO superlattices
- Bulk magnetic order in a two dimensional Ni1+/Ni2+ (d9/d8) nickelate, isoelectronic with superconducting cuprates
- Effective Hamiltonian for superconducting Ni oxides NdSrNiO
- Orbital Polarization in Strained LaNiO: Structural Distortions and Correlation Effects
- Mott Electrons in an Artificial Graphenelike Crystal of Rare-Earth Nickelate
- Crystal field splitting in correlated systems with the negative charge-transfer gap
- Chain breaks and the susceptibility of Sr_2Cu_{1-x}Pd_xO_{3+δ} and other doped quasi one-dimensional antiferromagnets
- Boundary susceptibility in the spin-1/2 chain: Curie like behavior without magnetic impurities
- Effects of Sr-doping on the electronic and spin-state properties of infinite-layer nickelates
- Strongly correlated doped hole carriers in the superconducting nickelates: Their location, local many-body state, and low-energy effective Hamiltonian
- The -axis dimer and its electronic break-up: the insulator-to-metal transition in TiO
- Experimental Evidence that Zn Impurities Pin Pair-Density-Wave Order in LaBaCuO
- Finite-size effects in the quasi-one-dimensional quantum magnets SrCuO, SrCuMO (M = Ni, Zn), and SrCuO
- The effect of different in-chain impurities on the magnetic properties of the spin chain compound SrCuO probed by NMR