Role of electron-electron and electron-phonon interaction effect in the optical conductivity of VO2
arXiv:cond-mat/0603339 · doi:10.1103/PhysRevB.73.165116
Abstract
We have investigated the charge dynamics of VO2 by optical reflectivity measurements. Optical conductivity clearly shows a metal-insulator transition. In the metallic phase, a broad Drude-like structure is observed. On the other hand, in the insulating phase, a broad peak structure around 1.3 eV is observed. It is found that this broad structure observed in the insulating phase shows a temperature dependence. We attribute this to the electron-phonon interaction as in the photoemission spectra.
6 pages, 8 figures, accepted for publication in Phys. Rev. B
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