Hole dynamics in spin and orbital ordered vanadium perovskites

Abstract

Hole dynamics in spin and orbital ordered vanadates with perovskite structure is investigated. A mobile hole coupled to the spin excitation (magnon) in the spin G-type and orbital C-type (SG/OC) ordered phase, and that to the orbital excitation (orbiton) in the spin C-type and orbital G-type (SC/OG) one are formulated on an equal footing. The observed fragile character of the (SG/OC) order is attributed to the orbiton softening caused by a reduction of the taggered magnetic order parameter. It is proposed that the qualitatively different hole dynamics in the two spin-orbital ordered phases in vanadates can be probed by the optical spectra.

4pages, 4figures

References in corpus (5)

• Magnetic neutron scattering study of YVO3: Evidence for an orbital Peierls state
• Dimerization versus Orbital Moment Ordering in the Mott insulator YVO${}_3$
• One-Dimensional Confinement and Enhanced Jahn-Teller Instability in LaVO${}_3$
• Unusual Symmetries in the Kugel-Khomskii Hamiltonian
• Orbital Wave and its Observation in Orbital Ordered Titanates and Vanadates

Cited by in corpus (17)

• Neutron diffraction study of YVO3, NdVO3, and TbVO3
• Orbital Disordering and metal-insulator transition with hole-doping in perovskite-type vanadium oxides
• Von Neumann Entropy Spectra and Entangled Excitations in Spin-Orbital Models
• Orbitally induced string formation in the spin-orbital polarons
• Doping variation of anisotropic charge and orbital dynamics in Y1-xCaxVO3 : Comparison with La1-xSrxVO3
• Transient Carrier Dynamics in a Mott Insulator with Antiferromagnetic Order
• Defect states and spin-orbital physics in doped vanadates Y1-xCaxVO3
• Defect-induced orbital polarization and collapse of orbital order in doped vanadium perovskites
• Defects, disorder and strong electron correlations in orbital degenerate, doped Mott insulators
• Orbital-Peierls State in NaTiSi2O6
• Charge and orbital order in transition metal oxides
• Spin, orbital and topological order in models of strongly correlated electrons
• Orbiton-magnon interplay in the spin-orbital polarons of KCuF3 and LaMnO3
• Magnon dressing by orbital excitations in ferromagnetic planes of K${}_2$CuF${}_4$ and LaMnO${}_3$
• Spectral properties of spin-orbital polarons as a fingerprint of orbital order
• Orbital Rotations induced by Charges of Polarons and Defects in Doped Vanadates
• Double exchange model in cubic vanadates