Dimensionality controlled Mott transition and correlation effects in single- and bi-layer perovskite iridates

Abstract

We studied Sr2IrO4 and Sr3Ir2O7 using angle-resolved photoemission spectroscopy (ARPES), making direct experimental determinations of intra- and inter-cell coupling parameters as well as Mott correlations and gap sizes. The results are generally consistent with LDA+U+Spin-orbit coupling (SOC) calculations, though the calculations missed the momentum positions of the dominant electronic states and neglected the importance of inter-cell coupling on the size of the Mott gap. The calculations also ignore the correlation-induced spectral peak widths, which are critical for making a connection to activation energies determined from transport experiments. The data indicate a dimensionality-controlled Mott transition in these 5d transition-metal oxides (TMOs).

18 pages, 5 figures

References in corpus (13)

• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• 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
• Quantum spin Hall effect in a transition metal oxide Na2IrO3
• Topological insulators and metal-insulator transition in the pyrochlore iridates
• Possible proximity of the Mott insulating Iridate Na2IrO3 to a topological phase: Phase diagram of the Heisenberg-Kitaev model in a magnetic field
• Lattice-Driven Magnetoresistivity and Metal-Insulator Transition in Single-Layered Iridates
• Microscopic study of spin-orbit-induced Mott insulator in Ir oxides
• Spin-Orbit Integrated Ground State and Magnetic Anisotropy in Sr${}_2$IrO${}_4$
• Topological Quantum Phase Transition in 5$d$ Transition Metal Oxide Na${}_2$IrO${}_3$
• The J_{eff}=1/2 insulator Sr3Ir2O7 studied by means of angle-resolved photoemission spectroscopy

Cited by in corpus (56)

• Interplay of Spin-Orbit Interactions, Dimensionality, and Octahedral Rotations in Semimetallic SrIrO${}_3$
• The Challenge of Spin-Orbit-Tuned Ground States in Iridates
• Effective J=1/2 insulating state in Ruddlesden-Popper iridates: An LDA+DMFT study
• Excitonic quasiparticles in a spin-orbit Mott insulator
• Metal-insulator transition and topological properties of pyrochlore iridates
• Imaging the evolution of metallic states in a spin-orbit interaction driven correlated iridate
• Transfer of spectral weight across the gap of Sr2IrO4 induced by La doping
• A charge density wave-like instability in a doped spin-orbit-assisted weak Mott insulator
• Spectroscopic evidence for negative electronic compressibility in a quasi-three-dimensional spin-orbit correlated metal
• Relativistic $GW$+BSE study of the optical properties of Ruddlesden-Popper iridates
• Theoretical study of insulating mechanism in multi-orbital Hubbard models with a large spin-orbit coupling: Slater versus Mott scenario in Sr${}_2$IrO${}_4$
• Persistent non-metallic behavior in Sr2IrO4 and Sr3Ir2O7 at high pressures
• Carrier localization and electronic phase separation in a doped spin-orbit driven Mott phase in Sr3(Ir1-xRux)2O7
• Structure symmetry determination and magnetic evolution in $\mathrm{S}{\mathrm{r}}_2\mathrm{I}{\mathrm{r}}_{1-\mathrm{x}}\mathrm{R}{\mathrm{h}}_{\mathrm{x}}{\mathrm{O}}_4$
• Decoupling of the Antiferromagnetic and Insulating States in Tb doped Sr2IrO4
• Pressure-Induced Confined Metal from the Mott Insulator Sr3Ir2O7
• A weakly correlated Fermi liquid state with a small Fermi surface in lightly doped Sr${}_3$Ir${}_2$O${}_7$
• Electrical Control of Structural and Physical Properties via Strong Spin-Orbit Interactions in Sr2IrO4
• Correlated vs. conventional insulating behavior in the Jeff=1/2 vs. 3/2 bands in the layered iridate Ba2IrO4
• Suppressing The Ferroelectric Switching Barrier in Hybrid Improper Ferroelectrics
• Poor electronic screening in lightly doped Mott insulators observed with scanning tunneling microscopy
• Novel spin-orbit coupling driven emergent states in iridate-based heterostructures
• Spectral functions of Sr${}_2$IrO${}_4$: theory versus experiment
• Persistent Insulator: Avoidance of Metallization at Megabar Pressures in Strongly Spin-Orbit-Coupled Sr2IrO4
• Maximum Quantum Entropy Method
• Antiferromagnetic Excitonic Insulator State in Sr3Ir2O7
• Formation of an incoherent metallic state in Rh-doped Sr${}_2$IrO${}_4$
• Correlation induced electron-hole asymmetry in quasi-2D iridates
• Direct observation of the Mott gap in strontium iridate with a scanning tunneling microscope
• Thermoelectric behavior of Ruddlesden-Popper series iridates
• Evolution of remnant Fermi surface state in lightly-doped correlated spin-orbit insulator Sr${}_{2-x}$La${}_x$IrO${}_4$
• Optical anisotropy of the Jeff = 1/2 Mott insulator Sr2IrO4
• Magnetic properties of bilayer Sr${}_3$Ir${}_2$O${}_7$: role of epitaxial strain and oxygen vacancies
• Three-dimensional electronic structures and the metal-insulator transition in Ruddlesden-Popper iridates
• Magnetic excitations in a three-orbital model for the strongly spin-orbit coupled iridates: Effect of mixing between the J=1/2 and 3/2 sectors
• 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
• High-pressure insulator-to-metal transition in Sr${}_3$Ir${}_2$O${}_7$ studied by x-ray absorption spectroscopy
• Spin correlated electronic state on the surface of a spin-orbit Mott system (Layered Iridates)
• On the nature of the Mott transition in multiorbital systems
• High-energy electronic excitations in Sr${}_2$IrO${}_4$ observed by Raman scattering
• Quasiparticles and charge transfer at the two surfaces of the honeycomb iridate Na${}_2$IrO${}_3$
• Simultaneous Metal-Insulator and Antiferromagnetic Transitions in Orthorhombic Perovskite Iridate Sr0.94Ir0.78O2.68 Single Crystals
• Optical Signature of a Crossover from Mott- to Slater-type Gap in Sr${}_2$Ir${}_{1-x}$Rh${}_x$O${}_4$
• Symmetry-resolved two-magnon excitations in a strong spin-orbit-coupled bilayer antiferromagnet
• Decoupling of magnetism and electric transport in single-crystal (Sr1-xAx)2IrO4 (A = Ca or Ba)
• Influence of multiplet structure on photoemission spectra of spin-orbit driven Mott insulators: application to $\mathbf{S}{\mathbf{r}}_2\mathbf{Ir}{\mathbf{O}}_4$
• Coherent and incoherent bands in La and Rh doped Sr3Ir2O7
• Hallmarks of the Mott-Metal Crossover in the Hole Doped J=1/2 Mott insulator Sr2IrO4
• Epitaxial stabilization of Sr3Ir2O7 thin films
• Constraints on the two-dimensional pseudo-spin 1/2 Mott insulator description of Sr${}_2$IrO${}_4$
• Possible superconductivity induced by a large spin-orbit coupling in carrier doped iridium oxide insulators: A weak coupling approach
• Evidence of Slater-type mechanism as origin of insulating state in Sr2IrO4
• Electron doping in ${\text{Sr}}_3{\text{Ir}}_2{\text{O}}_7$: collapse of band gap and magnetic order
• Fortuitous partners of antiferromagnetic and Mott states in spin-orbit-coupled Sr2IrO4: A study of Sr2Ir1-xMxO4 (M=Fe or Co)
• Orbital-Selective Spin-Orbit Mott Insulator in Fractional Valence Iridate La${}_3$Ir${}_3$O${}_{11}$
• Fermi surface and pseudogap in highly doped Sr${}_2$IrO${}_4$