Electrodynamics near the Metal-to-Insulator Transition in V3O5

Abstract

The electrodynamics near the metal-to-insulator transitions (MIT) induced, in V3O5 single crystals, by both temperature (T) and pressure (P) has been studied by infrared spectroscopy. The T- and P-dependence of the optical conductivity may be explained within a polaronic scenario. The insulating phase at ambient T and P corresponds to strongly localized small polarons. Meanwhile the T-induced metallic phase at ambient pressure is related to a liquid of polarons showing incoherent dc transport, in the P-induced metallic phase at room T strongly localized polarons coexist with partially delocalized ones. The electronic spectral weight is almost recovered, in both the T and P induced metallization processes, on an energy scale of 1 eV, thus supporting the key-role of electron-lattice interaction in the V3O5 metal-to-insulator transition.

7 pages, 5 figures

References in corpus (1)

• Correlated metallic state of vanadium dioxide

Cited by in corpus (7)

• Electrodynamics of Correlated Electron Materials
• Electrodynamics of the vanadium oxides VO2 and V2O3
• A Microscopic View on the Mott transition in Chromium-doped V2O3
• Direct observation of the electrically triggered Insulator-Metal transition in V3O5 far below the transition temperature
• Optical properties of V2O3 in its whole phase diagram
• Optical conductivity of V4O7 across its metal-insulator transition
• Signatures of polaronic charge ordering in optical and dc conductivity using dynamical mean field theory