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

Abstract

A three-orbital-model approach for studying spin wave excitations in the strongly spin-orbit coupled layered perovskite iridates is presented which provides a unified description of magnetic excitations as well as the electronic band structure. The calculated spin wave dispersions with realistic three-band parameters are in excellent agreement with the RIXS data for iridates, including the strong AF zone boundary dispersion in the single-layer compound $\mathrm{S}{\mathrm{r}}_2\mathrm{Ir}{\mathrm{O}}_4$ and the large anisotropy gap in the bilayer compound $\mathrm{S}{\mathrm{r}}_3\mathrm{I}{\mathrm{r}}_2{\mathrm{O}}_7$. The RIXS spin wave data is shown to provide evidence of mixing between the J=1/2 and 3/2 sectors in both compounds.

arXiv comment23 pages, 6 figures

References in corpus (33)

• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Spin waves and revised crystal structure of honeycomb iridate Na2IrO3
• 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 $\infty$)
• Isospin Dynamics in Sr2IrO4 : Forging Links to Cuprate Superconductivity
• Twisted Hubbard Model for Sr2IrO4: Magnetism and Possible High Temperature Superconductivity
• Fermi Arcs in a Doped Pseudospin-1/2 Heisenberg Antiferromagnet
• Observation of a $d$-wave gap in electron-doped Sr${}_2$IrO${}_4$
• Microscopic study of spin-orbit-induced Mott insulator in Ir oxides
• Novel magnetism of Ir5+ ions in the double perovskite Sr2YIrO6
• Signature of high temperature superconductivity in electron doped Sr2IrO4
• Excitonic quasiparticles in a spin-orbit Mott insulator
• Giant Magnon Gap in Bilayer Iridate Sr3Ir2O7: Enhanced Pseudo-dipolar Interactions Near the Mott Transition
• Spin-Orbit Integrated Ground State and Magnetic Anisotropy in Sr${}_2$IrO${}_4$
• The influence of electron-doping on the ground state of (Sr{1-x}La{x})2IrO4
• Dimensionality controlled Mott transition and correlation effects in single- and bi-layer perovskite iridates
• Persistent paramagnons deep in the metallic phase of Sr${}_{2-x}$La${}_x$IrO${}_4$
• Emergent excitation at the magnetic metal-insulator transition in the pyrochlore osmate Cd2Os2O7
• Tuning Magnetic Coupling in Sr${}_2$IrO${}_4$ Thin Films with Epitaxial Strain
• Theory of magnetism and metal-insulator transition in layered perovskite iridates
• Weak antiferromagnetism of J_eff=1/2 band in bilayer iridate Sr3Ir2O7
• Evidence of quantum dimer excitations in Sr${}_3$Ir${}_2$O${}_7$
• Theoretical study of insulating mechanism in multi-orbital Hubbard models with a large spin-orbit coupling: Slater versus Mott scenario in Sr${}_2$IrO${}_4$
• Mechanism of basal-plane antiferromagnetism in the spin-orbit driven iridate Ba2IrO4
• Doping Evolution of Magnetic Order and Magnetic Excitations in (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$
• Strongly Gapped Spin-Wave Excitation in the Insulating Phase of NaOsO3
• Anisotropic softening of magnetic excitations in lightly electron doped Sr${}_2$IrO${}_4$
• Microscopic theory of magnetism in Sr3Ir2O7
• Fermi Arcs vs. Fermi Pockets in Electron-doped Perovskite Iridates
• Spin-wave spectrum in La2CuO4 -- double occupancy and competing interaction effects
• Analysis of resonant inelastic x-ray scattering from Sr${}_2$IrO${}_4$ in an itinerant-electron approach
• Interplay between Hund's coupling and spin-orbit interaction on elementary excitations in Sr2IrO4
• Spin waves in the AF state of the $t$-$t^{\prime }$ Hubbard model on the fcc lattice: competing interactions, frustration, and instabilities

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• Antiferromagnetic Excitonic Insulator State in Sr3Ir2O7
• Electronic structure and optical properties of Sr${}_2$IrO${}_4$ under epitaxial strain
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• Magnetic reorientation transition in a three orbital model for $\mathrm{C}{\mathrm{a}}_2\mathrm{Ru}{\mathrm{O}}_4$ -- Interplay of spin-orbit coupling, tetragonal distortion, and Coulomb interactions
• Octahedral tilting induced isospin reorientation transition in iridate heterostructures
• Effects of the structural distortion on the electronic band structure of {\boldmath $\mathrm{NaOs}{\mathrm{O}}_3$} studied within density functional theory and a three-orbital model
• Spin waves and stability of zigzag order in the Hubbard model with spin-dependent hopping terms - Application to the honeycomb lattice compounds $\mathrm{N}{\mathrm{a}}_2\mathrm{Ir}{\mathrm{O}}_3$ and $\alpha -\mathrm{RuC}{\mathrm{l}}_3$
• Spin-orbit coupling induced magnetic anisotropy and large spin wave gap in $\mathrm{NaOs}{\mathrm{O}}_3$
• Correlated motion of particle-hole excitations across the renormalized spin-orbit gap in $\mathrm{S}{\mathrm{r}}_2\mathrm{Ir}{\mathrm{O}}_4$
• Possible superconductivity induced by a large spin-orbit coupling in carrier doped iridium oxide insulators: A weak coupling approach
• Pseudo-spin rotation symmetry breaking by Coulomb interaction terms in spin-orbit coupled systems
• Stability of the Antiferromagnetic State in the Electron Doped Iridates
• Coupled spin-orbital fluctuations in a three orbital model for $4d$ and $5d$ oxides with electron fillings $n=3,4,5$ -- Application to $\mathrm{NaOs}{\mathrm{O}}_3$, $\mathrm{C}{\mathrm{a}}_2\mathrm{Ru}{\mathrm{O}}_4$, and $\mathrm{S}{\mathrm{r}}_2\mathrm{Ir}{\mathrm{O}}_4$
• Quantified Degeneracy, Entropy and Metal-Insulator Transition in Complex Transition-Metal Oxides