Direct Observation of Decoupled Structural and Electronic Transitions and an Ambient Pressure Monoclinic-Like Metallic Phase of VO${}_2$

Abstract

We report the simultaneous measurement of the structural and electronic components of the metal-insulator transition of VO${}_2$ using electron and photoelectron spectroscopies and microscopies. We show that these evolve over different temperature scales, and are separated by an unusual monoclinic-like metallic phase. Our results provide conclusive evidence that the new monoclinic-like metallic phase, recently identified in high-pressure and nonequilibrium measurements, is accessible in the thermodynamic transition at ambient pressure, and we discuss the implications of these observations on the nature of the MIT in VO${}_2$.

References in corpus (4)

• Orbital-assisted metal-insulator transition in VO${}_2$
• Photoemission evidence for a Mott-Hubbard metal-insulator transition in VO${}_2$
• 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

Cited by in corpus (13)

• Universal phase dynamics in VO2 switches revealed by ultrafast operando diffraction
• Direct observation of the M2 phase with its Mott transition in a VO${}_2$ film
• Multiple crossovers and coherent states in a Mott-Peierls insulator
• Massively strained VO2 thin film growth on RuO2
• Mapping nanoscale charge states and phase domains with quantitative hyperspectral coherent diffractive imaging spectroscopy
• Observation of weakened V-V dimers in the monoclinic metallic phase of strained VO2
• Mott materials: unsuccessful metals with a bright future
• VO${}_2$ under hydrostatic pressure: Isostructural phase transition close to a critical end-point
• Kinetically Decoupled Electrical and Structural Phase Transitions in VO2
• Nature of the photo-induced metallic state in monoclinic VO${}_2$
• Terahertz-driven ultrafast dynamics of rare-earth nickelates by controlling only the charge degree of freedom
• Interface-induced collective phase transition in VO2-based bilayers studied by layer selective spectroscopy
• Toward nonthermal control of excited quantum materials: framework and investigations by ultrafast electron scattering and imaging