Strain dependence of bonding and hybridization across the metal-insulator transition of VO2

Abstract

Soft x-ray spectroscopy is used to investigate the strain dependence of the metal-insulator transition of VO2. Changes in the strength of the V 3d - O 2p hybridization are observed across the transition, and are linked to the structural distortion. Furthermore, although the V-V dimerization is well-described by dynamical mean-field theory, the V-O hybridization is found to have an unexpectedly strong dependence on strain that is not predicted by band theory, emphasizing the relevance of the O ion to the physics of VO2.

References in corpus (4)

• Evidence for a Structurally-driven Insulator-to-metal Transition in VO2: a View from the Ultrafast Timescale
• Orbital-assisted metal-insulator transition in VO${}_2$
• VO2: A Novel View from Band Theory
• Real space investigation of structural changes at the metal-insulator transition in VO2

Cited by in corpus (4)

• Direct Observation of Decoupled Structural and Electronic Transitions and an Ambient Pressure Monoclinic-Like Metallic Phase of VO${}_2$
• Large epitaxial bi-axial strain induces a Mott-like phase transition in VO2
• Photoemission evidence for crossover from Peierls-like to Mott-like transition in highly strained VO${}_2$
• Observation of weakened V-V dimers in the monoclinic metallic phase of strained VO2