Coulomb correlations intertwined with spin and orbital excitations in LaCoO${}_3$

Abstract

We carried out temperature-dependent (20 - 550 K) measurements of resonant inelastic X-ray scattering on LaCoO${}_3$ to investigate the evolution of its electronic structure across the spin-state crossover. In combination with charge-transfer multiplet calculations, we accurately quantized the renormalized crystal-field excitation energies and spin-state populations. We show that the screening of the on-site Coulomb interaction of 3d electrons is orbital selective and coupled to the spin-state crossover in LaCoO${}_3$. The results establish that the gradual spin-state crossover is associated with a relative change of Coulomb energy versus bandwidth, leading to a Mott-type insulator-to-metal transition.

arXiv comment6 pages, 4 figures. Submitted to Phys. Rev. Lett

References in corpus (20)

• Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
• The spin state transition in LaCoO${}_3$; revising a revision
• Structural phenomena associated with the spin-state transition in LaCoO3
• Calculations of Hubbard U from first-principles
• Multiplet ligand-field theory using Wannier orbitals
• Orbital-driven nematicity in FeSe
• Emergence of the nematic electronic state in FeSe
• Selective Mottness as a key to iron superconductors
• Spin-Orbital Separation in the quasi 1D Mott-insulator Sr2CuO3
• Orbital-Selective Mott transition out of band degeneracy lifting
• Evidence for orbital ordering in LaCoO3
• Spin-state transition in LaCoO3: direct neutron spectroscopic evidence of excited magnetic states
• High-spin to low-spin and orbital polarization transitions in multiorbital Mott systems
• A different look at the spin state of Co${}^{3+}$ ions in CoO${}_5$ pyramidal coordination
• Electronic Structure Calculation by First Principles for Strongly Correlated Electron Systems
• Combining DFT and Many-Body Methods to Understand Correlated Materials
• Local Structure of La1-xSrxCoO3 determined from EXAFS and neutron PDF studies
• Spin state transition in LaCoO3 by variational cluster approximation
• Inelastic neutron scattering study of phonons and magnetic excitations in LaCoO${}_3$
• Orbital-selective Mott transitions in a doped two-band Hubbard model with crystal field splitting

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• Damping of spinful excitons in LaCoO${}_3$ by thermal fluctuations: Theory and experiment
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