The infrared conductivity of V(2)O(3) is measured in the whole phase diagram. Quasiparticles appear above the Neel temperature T(N) and eventually disappear further enhancing the temperature, leading to a pseudogap in the optical spectrum above 425 K. Our calculations demonstrate that this loss of coherence can be explained only if the temperature dependence of lattice parameters is considered. V(2)O(3) is therefore effectively driven from the "metallic" to the "insulating" side of the Mott transition as the temperature is increased. RI Capone, Massimo/A-7762-2008

Quasiparticle evolution and pseudogap formation in V(2)O(3): An infrared spectroscopy study / Baldassarre, L; Perucchi, A; Nicoletti, D; Toschi, A; Sangiovanni, G; Held, K; Capone, Massimo; Ortolani, M; Malavasi, L; Marsi, M; Metcalf, P; Postorino, P; Lupi, S.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 77:11(2008). [10.1103/PhysRevB.77.113107]

Quasiparticle evolution and pseudogap formation in V(2)O(3): An infrared spectroscopy study

Capone, Massimo;
2008

Abstract

The infrared conductivity of V(2)O(3) is measured in the whole phase diagram. Quasiparticles appear above the Neel temperature T(N) and eventually disappear further enhancing the temperature, leading to a pseudogap in the optical spectrum above 425 K. Our calculations demonstrate that this loss of coherence can be explained only if the temperature dependence of lattice parameters is considered. V(2)O(3) is therefore effectively driven from the "metallic" to the "insulating" side of the Mott transition as the temperature is increased. RI Capone, Massimo/A-7762-2008
77
11
113107
Baldassarre, L; Perucchi, A; Nicoletti, D; Toschi, A; Sangiovanni, G; Held, K; Capone, Massimo; Ortolani, M; Malavasi, L; Marsi, M; Metcalf, P; Postorino, P; Lupi, S.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11767/17361
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