The electronic structure of the high-symmetry perovskite iridate Ba2IrO4

Abstract

We report angle-resolved photoemission (ARPES) measurements, density functional and model tight-binding calculations on Ba${}_2$IrO${}_4$ (Ba-214), an antiferromagnetic ($T_N=230$ K) insulator. Ba-214 does not exhibit the rotational distortion of the IrO${}_6$ octahedra that is present in its sister compound Sr${}_2$IrO${}_4$ (Sr-214), and is therefore an attractive reference material to study the electronic structure of layered iridates. We find that the band structures of Ba-214 and Sr-214 are qualitatively similar, hinting at the predominant role of the spin-orbit interaction in these materials. Temperature-dependent ARPES data show that the energy gap persists well above $T_N$, and favour a Mott over a Slater scenario for this compound.

13 pages, 9 figures

References in corpus (10)

• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Strong electronic correlations from Hund's coupling
• Bandwidth-Controlled Insulator-Metal Transition and Correlated Metallic State in 5$d$ Transition Metal Oxides Sr${}_{n+1}$Ir${}_n$O${}_{3n+1}$ ($n$=1, 2, and $\infty$)
• Twisted Hubbard Model for Sr2IrO4: Magnetism and Possible High Temperature Superconductivity
• Microscopic study of spin-orbit-induced Mott insulator in Ir oxides
• Magnetic state of plutonium ion in metallic Pu and its compounds
• Robustness of basal-plane antiferromagnetic order and the $J_{eff}=1/2$ state in single-layer iridate spin-orbit Mott insulators
• Slaving of the magnetic moment canting to the correlated oxygen rotation in Sr2IrO4 revealed by X-ray resonant scattering
• Ab initio determination of excitation energies and magnetic couplings in correlated, quasi two-dimensional iridates
• CaIrO3 post-perovskite, a j = 1/2 quasi-one-dimensional antiferromagnet

Cited by in corpus (28)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Coulomb Correlations in 4d and 5d Oxides from First Principles - or How Spin-Orbit Materials choose their Effective Orbital Degeneracies
• Transfer of spectral weight across the gap of Sr2IrO4 induced by La doping
• Theoretical study of insulating mechanism in multi-orbital Hubbard models with a large spin-orbit coupling: Slater versus Mott scenario in Sr${}_2$IrO${}_4$
• Correlated vs. conventional insulating behavior in the Jeff=1/2 vs. 3/2 bands in the layered iridate Ba2IrO4
• Correlation effects and hidden spin-orbit entangled electronic order in parent and electron-doped iridates Sr${}_2$IrO${}_4$
• Novel spin-orbit coupling driven emergent states in iridate-based heterostructures
• Topological Properties and Functionalities in Oxide Thin Films and Interfaces
• Spectral functions of Sr${}_2$IrO${}_4$: theory versus experiment
• Possible quantum paramagnetism in compressed Sr${}_2$IrO${}_4$
• Pressure dependence of the structure and electronic properties of Sr3Ir2O7
• Correlation induced electron-hole asymmetry in quasi-2D iridates
• Evolution of remnant Fermi surface state in lightly-doped correlated spin-orbit insulator Sr${}_{2-x}$La${}_x$IrO${}_4$
• Non-local Coulomb correlations in pure and electron-doped ${\mathrm{Sr}}_2{\mathrm{IrO}}_4$: spectral functions, Fermi surface and pseudogap-like spectral weight distributions from oriented cluster dynamical mean field theory
• Epitaxial Ba2IrO4 thin-films grown on SrTiO3 substrates by pulsed laser deposition
• Role of Square Planar Coordination in the Magnetic Properties of Na4IrO4
• Anomalous Magnetoresistance due to Longitudinal Spin Fluctuations in a Jeff = 1/2 Mott Semiconductor
• Quasiparticles and charge transfer at the two surfaces of the honeycomb iridate Na${}_2$IrO${}_3$
• Analysis of resonant inelastic x-ray scattering from Sr${}_2$IrO${}_4$ in an itinerant-electron approach
• Effective Carrier Doping and Metallization in LaxSr2-x-yBayIrO4-delta Thin Films
• Low-Energy Model and Electron-Hole Doping Asymmetry of Single-Layer Ruddlesden-Popper Iridates
• Interplay between Hund's coupling and spin-orbit interaction on elementary excitations in Sr2IrO4
• Multiband $d-p$ model and self-doping in the electronic structure of Ba${}_2$IrO${}_4$
• Hallmarks of the Mott-Metal Crossover in the Hole Doped J=1/2 Mott insulator Sr2IrO4
• Possible superconductivity induced by a large spin-orbit coupling in carrier doped iridium oxide insulators: A weak coupling approach
• Collective excitations in Na${}_2$IrO${}_3$
• High-pressure synthesis of Ba${}_2$RhO${}_4$, a rhodate analogue of the layered perovskite Sr-ruthenate
• The rich phase diagram of the prototypical iridate Ba${}_2$IrO${}_4$: Effective low-energy models and metal-insulator transition