# Resolving the VO2 controversy: Mott mechanism dominates the insulator-to-metal transition

@article{Najera2016ResolvingTV, title={Resolving the VO2 controversy: Mott mechanism dominates the insulator-to-metal transition}, author={'Oscar N'ajera and Marcello Civelli and Vladimir Dobrosavljevi'c and Marcelo J. Rozenberg}, journal={Physical Review B}, year={2016}, volume={95}, pages={035113} }

We consider a minimal model to investigate the metal-insulator transition in ${\mathrm{VO}}_{2}$. We adopt a Hubbard model with two orbitals per unit cell, which captures the competition between Mott and singlet-dimer localization. We solve the model within dynamical mean-field theory, characterizing in detail the metal-insulator transition and finding new features in the electronic states. We compare our results with available experimental data, obtaining good agreement in the relevant model…

## 48 Citations

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It is shown that the metal-insulator transition in heavily doped vanadium dioxide can be driven by a magnetic field, suggesting the MI transition is due to structural instability.

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### Ja n 20 20 Magnetic-field-induced insulator – metal transition in W-doped VO 2 at 500 T

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Metal–insulator (MI) transitions in correlated electron systems have long been a central and controversial issue in material science. Vanadium dioxide (VO2) exhibits a first-order MI transition at…

### Imaging the nanoscale phase separation in vanadium dioxide thin films at terahertz frequencies

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Multi-modal THz and mid-IR nano-imaging is used to examine the phase transition in VO2 thin films, and the unexpectedly smooth transition at THz frequencies is discussed in the context of a dimer Hubbard model.

### Observation of Weakened V-V Dimers in the Monoclinic Metallic Phase of Strained VO_{2}.

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Using spectromicroscopy, it is shown that mesoscopic stripe order near the metal-insulator transition (MIT) of strained VO_{2} represents periodic modulations in both crystal symmetry and V-V dimerization.

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