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.

arXiv comment7 pages, 5 figures

References in corpus (8)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Universality and Critical Behavior at the Mott transition
• Infrared and Raman studies of the Verwey transition in magnetite
• Optical Conductivity in Mott-Hubbard Systems
• Correlated metallic state of vanadium dioxide
• The vanadium Magneli phases VnO(2n-1)
• Pressure dependence of the charge-density-wave gap in rare-earth tri-tellurides
• Electronic properties of correlated metals in the vicinity of a charge order transition: optical spectroscopy of $\alpha$-(BEDT-TTF)${}_{2}M$Hg(SCN)${}_4$ ($M$ = NH${}_4$, Rb, Tl)

Cited by in corpus (12)

• Electrodynamics of Correlated Electron Materials
• Electrodynamics of the vanadium oxides VO2 and V2O3
• A Microscopic View on the Mott transition in Chromium-doped V2O3
• Charge Distribution Near Oxygen Vacancies in Reduced Ceria
• Metal-insulator transition in NiS${}_{2-x}$Se${}_x$
• Infrared and Terahertz Spectroscopy of Strongly Correlated Electron Systems under Extreme Conditions
• 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
• Electrodynamics of BaFe2As2 from infrared measurements under pressure
• Signatures of polaronic charge ordering in optical and dc conductivity using dynamical mean field theory
• High-pressure infrared spectroscopy: tuning of the low-energy excitations in correlated electron systems