Crossover from itinerant to localized magnetic excitations through the metal-insulator transition in NaOsO${}_{\text{3}}$

Abstract

NaOsO${}_{\text{3}}$ undergoes a metal-insulator transition (MIT) at 410 K, concomitant with the onset of antiferromagnetic order. The excitation spectra have been investigated through the MIT by resonant inelastic x-ray scattering (RIXS) at the Os L${}_{\text{3}}$ edge. Low resolution ($\Delta E\sim$ 300 meV) measurements over a wide range of energies reveal that local electronic excitations do not change appreciably through the MIT. This is consistent with a picture in which structural distortions do not drive the MIT. In contrast, high resolution ($\Delta E\sim$ 56 meV) measurements show that the well-defined, low energy magnons in the insulating state weaken and dampen upon approaching the metallic state. Concomitantly, a broad continuum of excitations develops which is well described by the magnetic fluctuations of a nearly antiferromagnetic Fermi liquid. By revealing the continuous evolution of the magnetic quasiparticle spectrum as it changes its character from itinerant to localized, our results provide unprecedented insight into the nature of the MIT in \naoso. In particular, the presence of weak correlations in the paramagnetic phase implies a degree of departure from the ideal Slater limit.

arXiv commentJoint submission with Physical Review Letters [Phys. Rev. Lett. 120, 227203 (2018), accepted version at arXiv:1805.03176]. This article includes further discussion about the calculations performed, models used, and so on

References in corpus (40)

• Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
• Correlated quantum phenomena in the strong spin-orbit regime
• Spin-Orbit Physics Giving Rise to Novel Phases in Correlated Systems: Iridates and Related Materials
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Intense paramagnon excitations in a large family of high-temperature superconductors
• Spin Waves and Magnetic Exchange Interactions in CaFe2As2
• Normal-State Spin Dynamics and Temperature-Dependent Spin Resonance Energy in an Optimally Doped Iron Arsenide Superconductor
• Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal
• Observation of extended scattering continua characteristic of spin fractionalization in the 2D frustrated quantum magnet Cs2CuCl4 by neutron scattering
• Crystal field splitting and correlation effect on the electronic structure of A2IrO3
• Theory of Resonant Inelastic X-ray Scattering by Collective Magnetic Excitations
• Itinerant magnetic excitations in antiferromagnetic CaFe2As2
• Persistent spin excitations in doped antiferromagnets revealed by resonant inelastic light scattering
• Magnetically driven metal-insulator transition in NaOsO3
• Continuous metal-insulator transition of the antiferromagnetic perovskite NaOsO3
• Tetrahedral Magnetic Order and the Metal-Insulator Transition in the Pyrochlore Lattice of Cd2Os2O7
• Persistent high-energy spin excitations in iron pnictide superconductors
• Magnetic excitation spectrum of Na2IrO3 probed with resonant inelastic x-ray scattering
• Paramagnetic Spin Correlations in CaFe2As2 Single Crystals
• Slater to Mott crossover in the metal to insulator transition of Nd2Ir2O7
• Emergent excitation at the magnetic metal-insulator transition in the pyrochlore osmate Cd2Os2O7
• Magnetic state of pyrochlore Cd2Os2O7 emerging from strong competition of ligand distortions and longer-range crystalline anisotropy
• Lifetimes of antiferromagnetic magnons in two and three dimensions: experiment, theory, and numerics
• Searching for the Slater Transition in the Pyrochlore Cd${}_2$Os${}_2$O${}_7$ with Infrared Spectroscopy
• Giant spin-phonon-electronic coupling in a 5d oxide
• Spin-orbit coupling controlled $J=3/2$ electronic ground state in 5$d^3$ oxides
• Electronic excitations in the edge-shared relativistic Mott insulator: Na${}_2$IrO${}_3$
• Electronic structure and magnetic properties of NaOsO${}_3$
• Lifshitz transition driven by spin fluctuations and spin-orbit renormalization in NaOsO${}_3$
• Electromagnon dispersion probed by inelastic x-ray scattering
• A resonant inelastic x-ray scattering study of the spin and charge excitations in the overdoped superconductor La1.77Sr0.23CuO4
• Structural and Correlation Effects in the Itinerant Insulating Antiferromagnetic Perovskite NaOsO3
• Infrared evidence of a Slater metal-insulator transition in NaOsO3
• Anisotropic exchange and spin-wave damping in pure and electron-doped Sr${}_2$IrO${}_4$
• Resonant inelastic x-ray scattering operators for $t_{2g}$ orbital systems
• Strongly Gapped Spin-Wave Excitation in the Insulating Phase of NaOsO3
• Evolution of the magnetic excitations in NaOsO${}_3$ through its metal-insulator transition
• Crossover from spin-waves to diffusive spin excitations in underdoped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• High-Energy Damping by Particle-Hole Excitations in the Spin-Wave Spectrum of Iron-Based Superconductors
• Resonant inelastic x-ray scattering study of the electronic structure of Cu${}_2$O

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• Spin and orbital dynamics through the metal-to-insulator transition in Cd${}_2$Os${}_2$O${}_7$ probed with high-resolution RIXS
• 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 $\mathrm{S}{\mathrm{r}}_2\mathrm{Ir}{\mathrm{O}}_4$
• Melting of magnetic order in ${\mathrm{NaOsO}}_3$ by fs laser pulses
• Study of polycrystalline bulk Sr${}_3$OsO${}_6$ double-perovskite insulator: comparison with 1000 K ferromagnetic epitaxial films
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