Doping Evolution of Magnetic Order and Magnetic Excitations in (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$

Abstract

We use resonant elastic and inelastic X-ray scattering at the Ir-$L_3$ edge to study the doping-dependent magnetic order, magnetic excitations and spin-orbit excitons in the electron-doped bilayer iridate (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$ ($0\le x\le 0.065$). With increasing doping $x$, the three-dimensional long range antiferromagnetic order is gradually suppressed and evolves into a three-dimensional short range order from $x=0$ to $0.05$, followed by a transition to two-dimensional short range order between $x=0.05$ and $0.065$. Following the evolution of the antiferromagnetic order, the magnetic excitations undergo damping, anisotropic softening and gap collapse, accompanied by weakly doping-dependent spin-orbit excitons. Therefore, we conclude that electron doping suppresses the magnetic anisotropy and interlayer couplings and drives (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$ into a correlated metallic state hosting two-dimensional short range antiferromagnetic order and strong antiferromagnetic fluctuations of $J_{\text{eff}}=\frac{1}{2}$ moments, with the magnon gap strongly suppressed.

arXiv comment6 Pages, 3 Figures, with supplementary in Source

References in corpus (45)

• 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
• Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
• Correlated quantum phenomena in the strong spin-orbit regime
• Mott physics and band topology in materials with strong spin-orbit interaction
• Spin-Orbit Physics Giving Rise to Novel Phases in Correlated Systems: Iridates and Related Materials
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Spin waves and electronic interactions in La2CuO4
• 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
• Intense paramagnon excitations in a large family of high-temperature superconductors
• Fermi Arcs in a Doped Pseudospin-1/2 Heisenberg Antiferromagnet
• Observation of a $d$-wave gap in electron-doped Sr${}_2$IrO${}_4$
• Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal
• Monte Carlo study of an unconventional superconducting phase in Ir-oxide J_{eff}=1/2 Mott insulators induced by carrier doping
• The magnetic and crystal structures of Sr2IrO4: A neutron diffraction study
• Engineering spin-orbital magnetic insulator by tailoring superlattices
• Lattice-Driven Magnetoresistivity and Metal-Insulator Transition in Single-Layered Iridates
• Anomalous High-Energy Spin Excitations in La2CuO4
• Collapse of the Mott gap and emergence of a nodal liquid in lightly doped Sr${}_2$IrO${}_4$
• Signature of high temperature superconductivity in electron doped Sr2IrO4
• Effective J=1/2 insulating state in Ruddlesden-Popper iridates: An LDA+DMFT study
• Excitonic quasiparticles in a spin-orbit Mott insulator
• Giant Magnon Gap in Bilayer Iridate Sr3Ir2O7: Enhanced Pseudo-dipolar Interactions Near the Mott Transition
• Dimensionality Driven Spin-Flop Transition in Layered Iridates
• Persistent high-energy spin excitations in iron pnictide superconductors
• The influence of electron-doping on the ground state of (Sr{1-x}La{x})2IrO4
• Persistent paramagnons deep in the metallic phase of Sr${}_{2-x}$La${}_x$IrO${}_4$
• Imaging the evolution of metallic states in a spin-orbit interaction driven correlated iridate
• Antiferromagnetic order and domains in Sr3Ir2O7 probed by x-ray resonant scattering
• Two-magnon Raman scattering and pseudospin-lattice interactions in Sr2IrO4 and Sr3Ir2O7
• Tuning Jeff = 1/2 Insulating State via Electron Doping and Pressure in Double-Layered Iridate Sr3Ir2O7
• Spectroscopic evidence for negative electronic compressibility in a quasi-three-dimensional spin-orbit correlated metal
• Evidence of quantum dimer excitations in Sr${}_3$Ir${}_2$O${}_7$
• First-order melting of a weak spin-orbit Mott insulator into a correlated metal
• 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${}_7$
• Anisotropic softening of magnetic excitations in lightly electron doped Sr${}_2$IrO${}_4$
• Temperature dependence of the paramagnetic spin excitations in BaFe${}_2$As${}_2$
• Intra-layer doping effects on the high-energy magnetic correlations in NaFeAs
• Direct observation of the Mott gap in strontium iridate with a scanning tunneling microscope
• Fermi Arcs vs. Fermi Pockets in Electron-doped Perovskite Iridates
• Disordered dimer state in electron-doped Sr${}_3$Ir${}_2$O${}_7$
• Simultaneous Metal-Insulator and Antiferromagnetic Transitions in Orthorhombic Perovskite Iridate Sr0.94Ir0.78O2.68 Single Crystals

Cited by in corpus (22)

• The Challenge of Spin-Orbit-Tuned Ground States in Iridates
• Mixing of $t_{2g}$-$e_g$ orbitals in 4d and 5d transition metal oxides
• Fingerprints of Kitaev physics in the magnetic excitations of honeycomb iridates
• Superconductivity in high-$T_c$ and related strongly correlated systems from variational perspective: Beyond mean field theory
• Strain-engineering of the charge and spin-orbital interactions in Sr2IrO4
• Laser-Induced Transient Magnons in Sr3Ir2O7 Throughout the Brillouin Zone
• Dispersive Magnetic and Electronic Excitations in Iridate Perovskites Probed with Oxygen $K$-Edge Resonant Inelastic X-ray Scattering
• Novel spin-orbit coupling driven emergent states in iridate-based heterostructures
• Antiferromagnetic Excitonic Insulator State in Sr3Ir2O7
• 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
• Resolving the nature of electronic excitations in resonant inelastic x-ray scattering
• Imaging antiferromagnetic domain fluctuations and the effect of atomic-scale disorder in a doped spin-orbit Mott insulator
• Magnetic excitations in double perovskite iridates La${}_2$$M$IrO${}_6$ ($M$ = Co, Ni, and Zn) mediated by 3$d$-5$d$ hybridization
• Symmetry-resolved two-magnon excitations in a strong spin-orbit-coupled bilayer antiferromagnet
• Resonant inelastic x-ray scattering of magnetic excitations under pressure
• Exciton condensation in bilayer spin-orbit insulator
• Doping driven structural distortion in the bilayer iridate (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$
• Carrier dynamics in doped bilayer iridates near magnetic quantum criticality
• Putative magnetic quantum criticality in (Sr${}_{\text{1-x}}$La${}_{\text{x}}$)${}_{\text{3}}$Ir${}_{\text{2}}$O${}_{\text{7}}$
• Magnetism in artificial Ruddlesden-Popper iridates leveraged by structural distortions
• Coexistence of insulator-like paramagnon and metallic spin-orbit exciton modes in SrIrO${}_3$
• Mixed-pairing superconductivity in 5d Mott insulators with antisymmetric exchange