Structural investigation of the bilayer iridate Sr3Ir2O7

Abstract

A complete structural solution of the bilayer iridate compound Sr3Ir2O7 presently remains outstanding. Previously reported structures for this compound vary and all fail to explain weak structural violations observed in neutron scattering measurements as well as the presence of a net ferromagnetic moment in the basal plane. In this paper, we present single crystal neutron diffraction and rotational anisotropy second harmonic generation measurements unveiling a lower, monoclinic symmetry inherent to Sr3Ir2O7 . Combined with density functional theory, our measurements identify the correct structural space group as No. 15 (C2/c) and provide clarity regarding the local symmetry of Ir 4+ cations within this spin-orbit Mott material.

7 pages, 3 figures

References in corpus (21)

• 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
• 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 $\infty$)
• The magnetic and crystal structures of Sr2IrO4: A neutron diffraction study
• Evidence of an odd-parity hidden order in a spin-orbit coupled correlated iridate
• Giant Magnon Gap in Bilayer Iridate Sr3Ir2O7: Enhanced Pseudo-dipolar Interactions Near the Mott Transition
• Dimensionality Driven Spin-Flop Transition in Layered Iridates
• Slaving of the magnetic moment canting to the correlated oxygen rotation in Sr2IrO4 revealed by X-ray resonant scattering
• Neutron scattering study of correlated phase behavior in Sr2IrO4
• A structural distortion induced magneto-elastic locking in Sr${}_2$IrO${}_4$ revealed through nonlinear optical harmonic generation
• Antiferromagnetic order and domains in Sr3Ir2O7 probed by x-ray resonant scattering
• Weak antiferromagnetism of J_eff=1/2 band in bilayer iridate Sr3Ir2O7
• Evidence of quantum dimer excitations in Sr${}_3$Ir${}_2$O${}_7$
• Spectroscopic evidence for polaronic behaviour of the strong spin-orbit insulator Sr${}_3$Ir${}_2$O${}_7$
• 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 $\mathrm{S}{\mathrm{r}}_2\mathrm{I}{\mathrm{r}}_{1-\mathrm{x}}\mathrm{R}{\mathrm{h}}_{\mathrm{x}}{\mathrm{O}}_4$
• First-order melting of a weak spin-orbit Mott insulator into a correlated metal
• Spin ordering and electronic texture in the bilayer iridate Sr${}_3$Ir${}_2$O${}_7$
• A Low Temperature Nonlinear Optical Rotational Anisotropy Spectrometer for the Determination of Crystallographic and Electronic Symmetries
• Microscopic theory of magnetism in Sr3Ir2O7
• Spin correlated electronic state on the surface of a spin-orbit Mott system (Layered Iridates)

Cited by in corpus (24)

• A global inversion-symmetry-broken phase inside the pseudogap region of YBa${}_2$Cu${}_3$O${}_y$
• The Challenge of Spin-Orbit-Tuned Ground States in Iridates
• Coulomb Correlations in 4d and 5d Oxides from First Principles - or How Spin-Orbit Materials choose their Effective Orbital Degeneracies
• Lattice frustration in spin-orbit Mott insulator Sr3Ir2O7 at high pressure
• Magnetic properties of bilayer Sr${}_3$Ir${}_2$O${}_7$: role of epitaxial strain and oxygen vacancies
• Disordered dimer state in electron-doped Sr${}_3$Ir${}_2$O${}_7$
• High-pressure insulator-to-metal transition in Sr${}_3$Ir${}_2$O${}_7$ studied by x-ray absorption spectroscopy
• Magnetic Fluctuations and the Spin-Orbit Interaction in Mott Insulating CoO
• Sr${}_2$IrO${}_4$/Sr${}_3$Ir${}_2$O${}_7$ superlattice for a model 2D quantum Heisenberg antiferromagnet
• Symmetry-resolved two-magnon excitations in a strong spin-orbit-coupled bilayer antiferromagnet
• Resonant inelastic x-ray scattering of magnetic excitations under pressure
• Octahedral tilting induced isospin reorientation transition in iridate heterostructures
• Doping driven structural distortion in the bilayer iridate (Sr${}_{1-x}$La${}_x$)${}_3$Ir${}_2$O${}_7$
• Overdamped antiferromagnetic strange metal state in Sr${}_3$IrRuO${}_7$
• Spin-orbit excitons and electronic configuration of the $5d^4$ insulator Sr${}_3$Ir${}_2$O${}_7$F${}_2$
• Exploration of trivial and non-trivial electronic phases and of collinear and non-collinear magnetic phases in low-spin d${}^5$ perovskites
• Quasi-2D anomalous Hall Mott insulator of topologically engineered Jeff =1/2 electrons
• Coherent and incoherent bands in La and Rh doped Sr3Ir2O7
• Polarized Raman spectroscopy study of metallic $(S{r}_{1-x}L{a}_x{)}_{3}I{r}_2{O}_7$: a consistent picture of disorder-interrupted unidirectional charge order
• Electron doping in ${\text{Sr}}_3{\text{Ir}}_2{\text{O}}_7$: collapse of band gap and magnetic order
• Sr${}_3$Ir${}_2$O${}_7$F${}_2$: Topochemical conversion of a relativistic Mott state into a spin-orbit driven band insulator
• Evolution of the spectral lineshape at the magnetic transition in Sr2IrO4 and Sr3Ir2O7
• Magnetism in artificial Ruddlesden-Popper iridates leveraged by structural distortions
• Absence of temperature-dependent phonon anomalies in Sr2IrO4 and Sr3Ir2O7