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Insulator-to-metal transition and correlated metallic state of V 2 O 3 investigated by optical spectroscopy
Stewart, M. K. Brownstead, D. Qazilbash, M. M.
Stewart, M. K.
Brownstead, D.
Qazilbash, M. M.
Abstract
The optical properties of V2O3 thin films are investigated across the insulator-to-metal transition and in the metallic state. The spectral weight transfer observed across the transition, over an energy scale of 5 eV, is consistent with the Mott-Hubbard model for correlated electron systems. In the metallic phase, a strong Drude peak is observed, which exhibits a pronounced temperature dependence related to the transfer of states from the Hubbard bands to the quasiparticle peaks as the temperature is reduced. The analysis of the far-infrared spectra reveals signatures of strong electronic correlations in V2O3. Finally, a comparison to VO2 data is presented.
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2012-05-01
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American Physical Society
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Physics
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https://doi.org/10.1103/PhysRevB.85.205113