Correlated metallic state of vanadium dioxide

Abstract

The metal-insulator transition and unconventional metallic transport in vanadium dioxide (VO${}_2$) are investigated with a combination of spectroscopic ellipsometry and reflectance measurements. The data indicates that electronic correlations, not electron-phonon interactions, govern charge dynamics in the metallic state of VO${}_2$. This study focuses on the frequency and temperature dependence of the conductivity in the regime of extremely short mean free path violating the Ioffe-Regel-Mott limit of metallic transport. The standard quasiparticle picture of charge conduction is found to be untenable in metallic VO${}_2$.

5 pages, 3 figures

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• Metal-insulator transition in vanadium dioxide nanobeams: probing sub-domain properties of strongly correlated materials
• Cluster Dynamical Mean Field Theory of the Mott Transition
• Electrodynamics of the vanadium oxides VO2 and V2O3
• Evidence of a pressure-induced metallization process in monoclinic VO${}_2$
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• Origins of bad metal conductivity and the insulator-metal transition in the rare-earth nickelates
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• Imaging the nanoscale phase separation in vanadium dioxide thin films at terahertz frequencies
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• Nanoscale imaging of the electronic and structural transitions in vanadium dioxide
• Optical properties of correlated materials -- Generalized Peierls approach and its application to VO2
• Effective band-structure in the insulating phase versus strong dynamical correlations in metallic VO2
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• Hydrogen Diffusion and Stabilization in Single-crystal VO2 Micro/nanobeams by Direct Atomic Hydrogenation
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• In situ diffraction study of catalytic hydrogenation of VO2: Stable phases and origins of metallicity
• Tunneling Breakdown of a Strongly Correlated Insulating State in VO${}_2$ Induced by Intense Multi-Terahertz Excitation
• Consecutive Insulator-Metal-Insulator Phase Transitions of Vanadium Dioxide by Hydrogen Doping
• Electrostatic modification of infrared response in gated structures based on VO2
• Charge transport in the Hubbard model at high temperatures: triangular versus square lattice
• Transport behavior and electronic structure of phase pure VO2 thin films grown on c-plane sapphire under different O2 partial pressure
• Quantifying electronic correlation strength in a complex oxide: a combined DMFT and ARPES study of LaNiO${}_3$
• Wigner-Mott scaling of transport near the two-dimensional metal-insulator transition
• Charge dynamics in thermally and doping induced insulator-metal transitions of (Ti1-xVx)2O3
• Bad-Metallic Behavior of Doped Mott Insulators
• Electrodynamics near the Metal-to-Insulator Transition in V3O5
• Ultrafast Electron-Lattice Coupling Dynamics in VO2 and V2O3 Thin Films
• Optical properties of VO${}_2$ films at the phase transition: influence of substrate and electronic correlations
• Anisotropic compression in the high pressure regime of pure and Cr-doped vanadium dioxide
• Optical Properties of Correlated Materials -- or Why Intelligent Windows may look Dirty
• Materials Design using Correlated Oxides: Optical Properties of Vanadium Dioxide
• Influence of disorder on incoherent transport near the Mott transition
• VO${}_2$ as a natural optical metamaterial
• Electrical switching and oscillations in vanadium dioxide
• Mott-Hubbard gap closure and structural phase transition in the oxyhalides TiOBr and TiOCl under pressure
• Optical study of superconducting Pr${}_2$CuO${}_x$ with $x\simeq 4$
• Microscopic nature of the asymmetric hysteresis in the insulator-metal transition of VO${}_2$ revealed by spectroscopic ellipsometry
• Decoupled few-femtosecond phase transitions in vanadium dioxide
• Electron Correlation driven Metal-Insulator transition in Strained and Disordered VO2 films
• Substrate-induced microstructure effects on the dynamics of the photo-induced Metal-insulator transition in VO${}_2$ thin films
• Non-Fermi-liquid behavior and doping asymmetry in an organic Mott insulator interface
• Occupation switching of $d$ orbitals probed via hyperfine interactions in vanadium dioxide
• Mesoscopic quantum effects in a bad metal, hydrogen-doped vanadium dioxide
• Thermally Driven Analog of the Barkhausen Effect at the Metal-Insulator Transition in Vanadium Dioxide
• Catalog of cubic, symmetry-protected, non-Fermi liquid, Kondo-type exchange models for doublet impurities
• Tuning of Localized Surface Plasmons in Vanadium Dioxide Nanoparticles via Size and Insulator-Metal Transition