Orbital ordering in charge transfer insulators

Abstract

We discuss a new mechanism of orbital ordering, which in charge transfer insulators is more important than the usual exchange interactions and which can make the very type of the ground state of a charge transfer insulator, i.e. its orbital and magnetic ordering, different from that of a Mott-Hubbard insulator. This purely electronic mechanism allows us to explain why orbitals in Jahn-Teller materials typically order at higher temperatures than spins, and to understand the type of orbital ordering in a number of materials, e.g. K_2CuF_4, without invoking the electron-lattice interaction.

4 pages, 2 figures

References in corpus (4)

• Quantum Melting of Magnetic Order due to Orbital Fluctuations
• Orbital ordering in frustrated Jahn-Teller systems
• Order from disorder: Quantum spin gap in magnon spectra of LaTiO_3
• Orbital Ordering in Paramagnetic LaMnO3 and KCuF3

Cited by in corpus (25)

• Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
• Fingerprints of spin-orbital physics in cubic Mott insulators: Magnetic exchange interactions and optical spectral weights
• Orbital ordering in LaMnO${}_3$: Electron-electron versus electron-lattice interactions
• Helicoidal ordering in iron perovskites
• Directional Ordering of Fluctuations in a Two-dimensional Compass Model
• Monte Carlo simulations of the directional-ordering transition in the two-dimensional classical and quantum compass model
• Orbital and spin physics in LiNiO2 and NaNiO2
• Role of Orbitals in the Physics of Correlated Electron Systems
• Noncollinear Magnetic Order Stabilized by Entangled Spin-Orbital Fluctuations
• Two-step stabilization of orbital order and the dynamical frustration of spin in the model charge-transfer insulator KCuF3
• Multiflavor Mott insulators in quantum materials and ultracold atoms
• Orbital ordering in cubic LaMnO3 from first principles calculations
• Overcoming the Sign Problem at Finite Temperature: Quantum Tensor Network for the Orbital $e_g$ Model on an Infinite Square Lattice
• Effects of interorbital hopping on orbital fluctuations and metal-insulator transitions: Extended linearized dynamical mean-field theory
• Theoretical Description of Pseudocubic Manganites
• Charge Ordering in Half-Doped Manganites: Weak Charge Disproportion and Leading Mechanisms
• Exact spin-orbital separation in a solvable model in one dimension
• X-ray and neutron diffraction studies of coupled structural phase transitions in DyBaCo${}_2$O${}_{5.5}$
• The Quantum Compass Model on the Square and Simple Cubic Lattices
• The emergence of Resonating Valence Bond physics in spin-orbital models
• Compass and Kitaev models -- Theory and Physical Motivations
• Anharmonic effect on lattice distortion, orbital ordering and magnetic properties in Cs2AgF4
• The role of Coulomb interaction on the electronic properties of monolayer NiX${}_2$ (X = S, Se): A DFT+U+V study
• Magnetic and orbital correlations in a two-site molecule
• Striped critical spin liquid in a spin-orbital entangled RVB state in a projected entangled-pair state representation