Momentum dependence of orbital excitations in Mott-insulating titanates

Abstract

High-resolution resonant inelastic x-ray scattering has been used to determine the momentum dependence of orbital excitations in Mott-insulating LaTiO${}_3$ and YTiO${}_3$ over a wide range of the Brillouin zone. The data are compared to calculations in the framework of lattice-driven and superexchange-driven orbital ordering models. A superexchange model in which the experimentally observed modes are attributed to two-orbiton excitations yields the best description of the data.

to appear in PRL

References in corpus (6)

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• Lattice Distortion and Magnetism of 3d-$t_{2g}$ Perovskite Oxides
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• Two-magnon excitations in resonant inelastic x-ray scattering from quantum Heisenberg antiferromagnets

Cited by in corpus (33)

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• Hartree-Fock Computation of the High-Tc Cuprate Phase Diagram
• Intrinsic coupling of orbital excitations to spin fluctuations in Mott insulators
• Microscopic origin of spin-orbital separation in Sr2CuO3
• Von Neumann Entropy Spectra and Entangled Excitations in Spin-Orbital Models
• Two-Spinon and Orbital Excitations of the Spin-Peierls System TiOCl
• Resonant inelastic x-ray scattering operators for $t_{2g}$ orbital systems
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• Orbital order, stacking defects and spin-fluctuations in the $p$-electron molecular solid RbO${}_2$
• Spin-orbital excitation continuum and anomalous electron-phonon interaction in the Mott insulator LaTiO${}_3$
• Fractionalization, entanglement, and separation: understanding the collective excitations in a spin-orbital chain
• Lattice coupling and Franck-Condon effects in K-edge resonant inelastic X-ray scattering
• Resonant Inelastic X-Ray Scattering as a Probe of the Phase and Excitations of the Order Parameter of Superconductors
• Vibronic Excitation Dynamics in Orbitally Degenerate Correlated Electron System
• Collective nature of orbital excitations in layered cuprates in the absence of apical oxygens
• Real-Space Visualization of Remnant Mott Gap and Magnon Excitations
• Spin-roton excitations in the cuprate superconductors
• Resonant inelastic x-ray scattering study of bond order and spin excitations in nickelate thin-film structures
• Theory of Raman and Resonant Inelastic X-ray Scattering from Collective Orbital Excitations in YTiO${}_3$
• Spectrum splitting of bimagnon excitations in a spatially frustrated Heisenberg antiferromagnet revealed by resonant inelastic x-ray scattering
• Magnon-phonon coupling effects on the indirect K-edge resonant inelastic X-ray scattering spectrum of a 2D Heisenberg antiferromagnet
• Coupling of phonons with orbital dynamics and magnetism in CuSb${}_2$O${}_6$
• Orbital breathing effects in the computation of x-ray d-ion spectra in solids by ab initio wave-function-based methods
• Theoretical approach to resonant inelastic x-ray scattering in iron-based superconductors at the energy scale of the superconducting gap
• Resonant inelastic x-ray scattering study of doping and temperature dependence of low-energy excitations in La${}_{1-x}$Sr${}_x$VO${}_3$
• Low-energy V t2g orbital excitations in NdVO3
• Dispersion of orbital excitations in 2D quantum antiferromagnets
• Dynamics of photo-induced ferromagnetism in oxides with orbital degeneracy
• Indirect K-edge bimagnon resonant inelastic X-ray scattering spectrum of $\alpha$-FeTe
• Spectroscopy of the frustrated quantum antiferromagnet Cs${}_2$CuCl${}_4$