Orbital-assisted metal-insulator transition in VO${}_2$

Abstract

We found direct experimental evidence for an orbital switching in the V 3d states across the metal-insulator transition in VO${}_2$. We have used soft-x-ray absorption spectroscopy at the V $L_{2,3}$ edges as a sensitive local probe, and have determined quantitatively the orbital polarizations. These results strongly suggest that, in going from the metallic to the insulating state, the orbital occupation changes in a manner that charge fluctuations and effective band widths are reduced, that the system becomes more 1-dimensional and more susceptible to a Peierls-like transition, and that the required massive orbital switching can only be made if the system is close to a Mott insulating regime.

Cited by in corpus (51)

• Electrodynamics of Correlated Electron Materials
• Electrodynamics of the vanadium oxides VO2 and V2O3
• VO2: A Novel View from Band Theory
• Correlated metallic state of vanadium dioxide
• Direct Observation of Decoupled Structural and Electronic Transitions and an Ambient Pressure Monoclinic-Like Metallic Phase of VO${}_2$
• Bands, resonances, edge singularities and excitons in core level spectroscopy investigated within the dynamical mean field theory
• Optical properties of correlated materials -- Generalized Peierls approach and its application to VO2
• Photoemission evidence for a Mott-Hubbard metal-insulator transition in VO${}_2$
• Effective band-structure in the insulating phase versus strong dynamical correlations in metallic VO2
• Non-resonant inelastic x-ray scattering involving excitonic excitations
• The insulating phases of vanadium dioxide are Mott-Hubbard insulators
• Ultrafast X-ray imaging of the light-induced phase transition in VO2
• Orbitally driven spin-singlet dimerization in $S$=1 La${}_4$Ru${}_2$O${}_{10}$
• Photoemission evidence for crossover from Peierls-like to Mott-like transition in highly strained VO${}_2$
• Strain dependence of bonding and hybridization across the metal-insulator transition of VO2
• Orbital-selective Peierls phase in the metallic dimerized chain MoOCl${}_2$
• Role of 1-D finite size Heisenberg chain in increasing metal to insulator transition temperature in hole rich VO2
• Optical response of metallic and insulating VO2 calculated with the LDA approach
• Cluster model calculations with non-local screening channels of metallic and insulating VO2
• Site-Selective Mott Transition in a Quasi-One-Dimensional Vanadate V6O13
• High temperature singlet-based magnetism from Hund's rule correlations
• Hole-driven MIT theory, Mott transition in VO_2, MoBRiK
• VO2 microcrystals as advanced smart window material at semiconductor to metal transition
• The photoinduced hidden metallic phase of monoclinic VO2 driven by local nucleation via a self-amplification process
• Photoemission study of TiO2/VO2 interfaces
• Identifying f-electron symmetries of UTe2 with O-edge resonant inelastic X-ray scattering
• Optical study of MgTi${}_2$O${}_4$: Evidence for an orbital-Peierls state
• Universality in one dimensional orbital wave ordering in spinel and related compounds: an experimental perspective
• Observation of weakened V-V dimers in the monoclinic metallic phase of strained VO2
• VO2 Phase Change Electrodes in Li-ion Batteries
• Nematic Ising superconductivity with hidden magnetism in few-layer 6R-TaS2
• Strain induced orbital dynamics across the Metal Insulator transition in thin VO2/TiO2(001) films
• Direct evidence of tungsten clustering in W${}_{\text{0.02}}$V${}_{\text{0.98}}$O${}_{\text{2}}$ thin films and its effect on the metal-to-insulator transition
• Structural instability and the Mott-Peierls transition in a half-metallic hollandite : K${}_2$Cr${}_8$O${}_{16}$
• Negative charge transfer energy in correlated compounds
• Ionic liquid gating induced two superconductor-insulator phase transitions in spinel oxide Li${}_{1\pm x}$Ti${}_2$O${}_{4-\delta }$
• Molecular orbital formation and metastable short-range ordered structure in VO${}_2$
• Lattice and Electronic properties of VO${}_2$ with the SCAN(+$U$) approach
• Occupation switching of $d$ orbitals probed via hyperfine interactions in vanadium dioxide
• Nature of the photo-induced metallic state in monoclinic VO${}_2$
• Mechanism of the Resistivity Switching Induced by the Joule Heating in Crystalline NbO${}_2$
• $J_{eff}$ states in a quasi one dimensional antiferromagnetic spin chain hexagonal Iridates Sr${}_3$MIrO${}_6$ (M=Mg, Zn, Cd): an $ab-initio$ comparative perspective
• Manipulating the anisotropic phase separation in strained VO2 epitaxial films by nanoscale ion-implantation
• Electronic phase diagram of Cr-doped VO2 epitaxial films studied by in situ photoemission spectroscopy
• Small polarons mediated near-room-temperature metal-insulator transition in vanadium dioxide and their hopping dynamics
• Interface-induced collective phase transition in VO2-based bilayers studied by layer selective spectroscopy
• From strong to weak correlations in breathing-mode kagome van der Waals materials: Nb${}_3$(F,Cl,Br,I)${}_8$ as a robust and versatile platform for many-body engineering
• Linear dichroic x-ray absorption response of Ti-Ti dimers along the $c$ axis in Ti${}_2$O${}_3$ upon Mg substitution
• Toward nonthermal control of excited quantum materials: framework and investigations by ultrafast electron scattering and imaging
• Magic thickness of 25 Å makes periodic metal-insulator transitions
• Current progress in vanadium oxide nanostructures and its composites as supercapacitor electrodes