Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet

Abstract

Ruthenium compounds play prominent roles in materials research ranging from oxide electronics to catalysis, and serve as a platform for fundamental concepts such as spin-triplet superconductivity, Kitaev spin-liquids, and solid-state analogues of the Higgs mode in particle physics. However, basic questions about the electronic structure of ruthenates remain unanswered, because several key parameters (including the Hund's-rule, spin-orbit, and exchange interactions) are comparable in magnitude, and their interplay is poorly understood - partly due to difficulties in synthesizing sizable single crystals for spectroscopic experiments. Here we introduce a resonant inelastic x-ray scattering (RIXS) technique capable of probing collective modes in microcrystals of $4d$-electron materials. We present a comprehensive set of data on spin waves and spin-state transitions in the honeycomb antiferromagnet SrRu${}_2$O${}_6$, which possesses an unusually high Néel temperature. The new RIXS method provides fresh insight into the unconventional magnetism of SrRu${}_2$O${}_6$, and enables momentum-resolved spectroscopy of a large class of $4d$ transition-metal compounds.

arXiv commentThe original submitted version of the published manuscript. https://www.nature.com/articles/s41563-019-0327-2

References in corpus (14)

• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
• Kitaev-Heisenberg Model on Honeycomb Lattice: Possible Exotic Phases in Iridium Oxides $A_2$IrO${}_3$
• Scattering Continuum and Possible Fractionalized Excitations in $\alpha$-RuCl${}_3$
• Evaluation of Spin-Triplet Superconductivity in Sr2RuO4
• Isospin Dynamics in Sr2IrO4 : Forging Links to Cuprate Superconductivity
• Higgs mode and its decay in a two dimensional antiferromagnet
• Raman scattering from Higgs mode oscillations in the two-dimensional antiferromagnet Ca${}_2$RuO${}_4$
• Antiferromagnetism at T > 500 K in the Layered Hexagonal Ruthenate SrRu2O6
• Localized itinerant electrons and unique magnetic properties of SrRu2O6
• High antiferromagnetic transition temperature of a honeycomb compound SrRu${}_2$O${}_6$
• Resonant inelastic x-ray scattering operators for $t_{2g}$ orbital systems
• Electronic structure and the origin of the high ordering temperature in SrRu2O6
• DFT+DMFT study on soft moment magnetism and covalent bonding in SrRu${}_2$O${}_6$

Cited by in corpus (20)

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• Towards Kitaev Spin Liquid in 3d Transition Metal Compounds
• Resonant inelastic x-ray scattering study of $\alpha$-RuCl${}_3$: a progress report
• Tuning spin excitations in magnetic films by confinement
• Tree tensor-network real-time multiorbital impurity solver: Spin-orbit coupling and correlation functions in Sr${}_2$RuO${}_4$
• Raman scattering from current-stabilized nonequilibrium phases in Ca${}_2$RuO${}_4$
• Magnetic and electronic ordering phenomena in the [Ru${}_2$O${}_6$] honeycomb lattice compound AgRuO${}_3$
• Spin and charge excitations in the correlated multiband metal Ca3Ru2O7
• Confined Magnons
• On the multi-$\mathbf{q}$ characteristics of magnetic ground states of honeycomb cobalt oxides
• Theoretical analysis of single-ion anisotropy in $d^3$ Mott insulators
• Magnetic ground state of the dimer-based hexagonal perovskite Ba${}_3$ZnRu${}_2$O${}_9$
• MoP${}_3$SiO${}_{11}$: a $4d^3$ honeycomb antiferromagnet with disconnected octahedra
• Resonant Inelastic X-ray Scattering from Electronic Excitations in $\alpha$-RuCl${}_3$ Nanolayers
• Hidden covalent insulator and spin excitations in SrRu${}_2$O${}_6$
• High temperature antiferromagnetism in ultrathin SrRu2O6 nanosheets
• Soft-X-ray momentum microscopy of nonlinear magnon interactions below 100-nm wavelength
• Magnetic Scattering Chapter
• Geometrical frustration and incommensurate magnetic order in Na${}_3$RuO${}_4$ with two triangular motifs