The electrodynamics near the metal-to-insulator transitions 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 transitions.

Baldassarre, L., Perucchi, A., Arcangeletti, E., Nicoletti, D., Di Castro, D., Postorino, P., et al. (2007). Electrodynamics near the metal-to-insulator transition in V3 O5. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 75(24), 245108 [10.1103/PhysRevB.75.245108].

Electrodynamics near the metal-to-insulator transition in V3 O5

Di Castro D.;
2007-06

Abstract

The electrodynamics near the metal-to-insulator transitions 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 transitions.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/03 - Fisica della Materia
English
Baldassarre, L., Perucchi, A., Arcangeletti, E., Nicoletti, D., Di Castro, D., Postorino, P., et al. (2007). Electrodynamics near the metal-to-insulator transition in V3 O5. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 75(24), 245108 [10.1103/PhysRevB.75.245108].
Baldassarre, L; Perucchi, A; Arcangeletti, E; Nicoletti, D; Di Castro, D; Postorino, P; Sidorov, Va; Lupi, S
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/194705
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