Charge transfer in the high dielectric constant materials CaCu3Ti4O12 and CdCu3Ti4O12

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dc.creatorHomes, C. C.
dc.creatorVogt, T.
dc.creatorShapiro, S. M.
dc.creatorSi, W.
dc.creatorWakimoto, S.
dc.creatorSubramanian, M. A.
dc.date2002-09-16
dc.date.accessioned2026-07-07T02:47:17Z
dc.date.available2026-07-07T02:47:17Z
dc.descriptionThe cubic perovskite-related ceramic CaCu3Ti4O12 has a very high static dielectric constant ~10000 at room temperature (RT), which drops to about 100 below about 100 K. Substituting Cd for Ca reduces the RT value of the dielectric constant by over an order of magnitude. The large the dielectric constant may be due to an internal barrier layer capacitance (IBLC) effect. Infrared optical properties show a low-frequency mode that increases dramatically in strength at low temperature, suggesting a change in the effective charges and a breakdown of the IBLC model due to a semiconductor-to-insulator transition.
dc.description4 pages with 4 embedded EPS figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0209367
dc.identifierhttp://arxiv.org/abs/cond-mat/0209367
dc.identifierPhys. Rev. B 67, 092106 (2003)
dc.identifierdoi:10.1103/PhysRevB.67.092106
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19952
dc.subjectStrongly Correlated Electrons
dc.titleCharge transfer in the high dielectric constant materials CaCu3Ti4O12 and CdCu3Ti4O12
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