Evolution of Spin-Orbital Entanglement with Increasing Ising Spin-Orbit Coupling
arXiv:2009.11773 · doi:10.3390/condmat5030053
Abstract
Several realistic spin-orbital models for transition metal oxides go beyond the classical expectations and could be understood only by employing the quantum entanglement. Experiments on these materials confirm that spin-orbital entanglement has measurable consequences. Here, we capture the essential features of spin-orbital entanglement in complex quantum matter utilizing 1D spin-orbital model which accommodates SU(2)xSU(2) symmetric Kugel-Khomskii superexchange as well as the Ising on-site spin-orbit coupling. Building on the results obtained for full and effective models in the regime of strong spin-orbit coupling, we address the question whether the entanglement found on superexchange bonds always increases when the Ising spin-orbit coupling is added. We show that (i) quantum entanglement is amplified by strong spin-orbit coupling and, surprisingly, (ii) almost classical disentangled states are possible. We complete the latter case by analyzing how the entanglement existing for intermediate values of spin-orbit coupling can disappear for higher values of this coupling.
arXiv commentProceedings paper [Quantum Complex Matter Conference, June 2020, Frascati] reporting on the research first presented in Physical Review Research 2, 013353 (2020) [arXiv:1911.12180]
References in corpus (54)
- Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
- Correlated quantum phenomena in the strong spin-orbit regime
- Kitaev quantum spin liquid - concept and materialization
- Physics of the Kitaev model: fractionalization, dynamical correlations, and material connections
- Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
- Quantum Melting of Magnetic Order due to Orbital Fluctuations
- Orbital liquid in three dimensional Mott insulator:
- Excitonic Magnetism in Van Vleck-type d^4 Mott Insulators
- Magnetic neutron scattering study of YVO3: Evidence for an orbital Peierls state
- Alternating Spin and Orbital Dimerization in Strong-coupling Two-band Models
- Spin-orbit physics of j=1/2 Mott insulators on the triangular lattice
- Spin-Orbital Entanglement and Violation of the Goodenough-Kanamori Rules
- Anisotropy of Mott-Hubbard gap transitions due to spin and orbital ordering in LaVO3 and YVO3
- Phase diagram of a 1 dimensional spin-orbital model
- Fingerprints of spin-orbital entanglement in transition metal oxides
- Dimerization versus Orbital Moment Ordering in the Mott insulator YVO
- The Fermi surface of Sr2RuO4: spin-orbit and anisotropic Coulomb interaction effects
- Evolution of Spin-Orbital-Lattice Coupling in the VO Perovskites
- Spin--orbital interaction for face-sharing octahedra: Realization of a highly symmetric SU(4) model
- Theory of optical spectral weights in Mott insulators with orbital degrees of freedom
- Raman scattering from Higgs mode oscillations in the two-dimensional antiferromagnet CaRuO
- Low-energy Mott-Hubbard excitations in LaMnO_3 probed by optical ellipsometry
- Frustration and entanglement in the spin--orbital model on a triangular lattice: valence--bond and generalized liquid states
- Kitaev-like honeycomb magnets: Global phase behavior and emergent effective models
- Effective magnetic interactions in spin-orbit coupled Mott insulators
- Thermally activated Peierls dimerization in ferromagnetic spin chains
- Low energy magnetic excitations in the spin-orbital Mott insulator SrIrO
- Orbital polarons versus itinerant e_g electrons in doped manganites
- Signatures of magnetic-field-driven quantum phase transitions in the entanglement entropy and spin dynamics of the Kitaev honeycomb model
- Entanglement Entropy and Spectra of the One-dimensional Kugel-Khomskii Model
- Fingerprints of Spin-Orbital Physics in Crystalline O
- Noncollinear Magnetic Order Stabilized by Entangled Spin-Orbital Fluctuations
- Singlet-triplet excitations and long range entanglement in the spin-orbital liquid candidate FeSc2S4
- High Temperature superconductivity in a hyperbolic geometry of complex matter from nanoscale to mesoscopic scale
- Spin-orbital resonating valence bond liquid on a triangular lattice: Evidence from finite-cluster diagonalization
- Spin-Orbital Entanglement and Phase Diagram of Spin-orbital Chain with Symmetry
- Topological Order in an Entangled SU(2)XY Spin-Orbital Ring
- Fractionalization, entanglement, and separation: understanding the collective excitations in a spin-orbital chain
- Highly frustrated magnetism in relativistic Mott insulators: Bosonic analog of Kitaev honeycomb model
- Correlation induced electron-hole asymmetry in quasi-2D iridates
- Multicolored quantum dimer models, resonating valence-bond states, color visons, and the triangular-lattice t_2g spin-orbital system
- Dynamics of a two-dimensional quantum spin-orbital liquid: spectroscopic signatures of fermionic magnons
- Defect-induced orbital polarization and collapse of orbital order in doped vanadium perovskites
- How spin-orbital entanglement depends on the spin-orbit coupling in a Mott insulator
- Theoretical evidence of spin-orbital-entangled =1/2 state in the 3 transition metal oxide CuAlO
- The road map toward room temperature superconductivity: manipulating different pairing channels in systems composed of multiple electronic components
- Orbital Symmetry and Orbital Excitations in High- Superconductors
- Emergent quantum criticality from spin-orbital entanglement in Mott insulators: the case of a diamond lattice antiferromagnet
- Lattice distortion in the spin-orbital entangled state in RVO3 perovskites
- Spin-Orbital Entangled Liquid State in the Copper Oxide BaCuSbO
- Spin, orbital and topological order in models of strongly correlated electrons
- Entanglement Driven Phase Transitions in Spin-Orbital Models
- Lifshitz transitions in multi-band Hubbard models for topological superconductivity in complex quantum matter
- Magnon dressing by orbital excitations in ferromagnetic planes of KCuF and LaMnO