Monoclinic and Correlated Metal Phase in VO_2 as Evidence of the Mott Transition: Coherent Phonon Analysis

Abstract

In femtosecond pump-probe measurements, the appearance of coherent phonon oscillations at 4.5 THz and 6.0 THz indicating the rutile metal phase of VO_2 does not occur simultaneously with the first-order metal-insulator transition (MIT) near 68^oC. The monoclinic and correlated metal(MCM) phase between the MIT and the structural phase transition (SPT) is generated by a photo-assisted hole excitation which is evidence of the Mott transition. The SPT between the MCM phase and the rutile metal phase occurs due to subsequent Joule heating. The MCM phase can be regarded as an intermediate non-equilibrium state.

4 pages, 2 figures

References in corpus (3)

• Evidence for a Structurally-driven Insulator-to-metal Transition in VO2: a View from the Ultrafast Timescale
• Orbital-assisted metal-insulator transition in VO${}_2$
• Correlated metallic state of vanadium dioxide

Cited by in corpus (50)

• Mott transition in VO2 revealed by infrared spectroscopy and nano-imaging
• Memory effects in complex materials and nanoscale systems
• Electrodynamics of Correlated Electron Materials
• Metal-insulator transition in vanadium dioxide nanobeams: probing sub-domain properties of strongly correlated materials
• Electrodynamics of the vanadium oxides VO2 and V2O3
• Instantaneous band gap collapse in photoexcited monoclinic VO${}_2$ due to photocarrier doping
• Losses in plasmonics: from mitigating energy dissipation to embracing loss-enabled functionalities
• Temperature dependence of Mott transition in VO_2 and programmable critical temperature sensor
• Infrared spectroscopy and nano-imaging of the insulator-to-metal transition in vanadium dioxide
• Three-terminal field effect devices utilizing thin film vanadium oxide as the channel layer
• Hall carrier density and magnetoresistance measurements in thin film vanadium dioxide across the metal-insulator transition
• Metal-insulator Transition in VO2: a DFT+DMFT perspective
• Imaging the nanoscale phase separation in vanadium dioxide thin films at terahertz frequencies
• Direct Observation of Decoupled Structural and Electronic Transitions and an Ambient Pressure Monoclinic-Like Metallic Phase of VO${}_2$
• Nanoscale imaging of the electronic and structural transitions in vanadium dioxide
• Effective band-structure in the insulating phase versus strong dynamical correlations in metallic VO2
• Sequential Electronic and Structural Transitions in VO2 Observed Using X-ray Absorption Spectromicroscopy
• Charge Distribution Near Oxygen Vacancies in Reduced Ceria
• Correlation Assisted Phonon Softenings and the Mott-Peierls Transition in VO${}_2$
• Ultrafast mid-infrared nanoscopy of strained vanadium dioxide nanobeams
• Unraveling the Mott-Peierls intrigue in Vanadium dioxide
• Consecutive Insulator-Metal-Insulator Phase Transitions of Vanadium Dioxide by Hydrogen Doping
• Electrostatic modification of infrared response in gated structures based on VO2
• Structural and Electronic Recovery Pathways of a Photoexcited Ultrathin VO2 Film
• Real space investigation of structural changes at the metal-insulator transition in VO2
• Unified Band Theoretic Description of Electronic and Magnetic Properties of Vanadium Dioxide Phases
• Mott switching and structural transition in the metal phase of $V{O}_2$ nanodomain
• Direct observation of the M2 phase with its Mott transition in a VO${}_2$ film
• Optical properties of VO${}_2$ films at the phase transition: influence of substrate and electronic correlations
• Multiple crossovers and coherent states in a Mott-Peierls insulator
• Mott transition in Cr-doped V2O3 studied by ultrafast reflectivity: electron correlation effects on the transient response
• Role of 1-D finite size Heisenberg chain in increasing metal to insulator transition temperature in hole rich VO2
• Anomalous electron transport in epitaxial NdNiO${}_3$ films
• Switching of the Mott transition based on the hole-driven MIT theory
• VO2 microcrystals as advanced smart window material at semiconductor to metal transition
• Electrical Oscillation in Pt/VO2 Bilayer Strips
• \textit{Ab initio} molecular dynamics study of the structural and electronic transition in VO${}_2$
• Effect of inhomogeneities and substrate on the dynamics of the metal-insulator transition in VO${}_2$ thin films
• Unconventional light-induced states visualized by ultrafast electron diffraction and microscopy
• 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
• Correlating the Energetics and Atomic Motions of the Metal-Insulator Transition of M1 Vanadium Dioxide
• VO${}_2$ under hydrostatic pressure: Isostructural phase transition close to a critical end-point
• Correlation induced emergent charge order in metallic vanadium dioxide
• Nature of the photo-induced metallic state in monoclinic VO${}_2$
• Occupation switching of $d$ orbitals probed via hyperfine interactions in vanadium dioxide
• Coherent phonon and unconventional carriers in the magnetic kagome metal Fe${}_3$Sn${}_2$
• Competitive coexistence of ferromagnetism and metal--insulator transition of VO${}_2$ nanoparticles
• Identification of a monoclinic metallic state in VO2 from a modified first-principles approach
• Hall measurement of ultra thin vanadium dioxide thin films
• Current progress in vanadium oxide nanostructures and its composites as supercapacitor electrodes