We have investigated the charge transfer mechanism in artificial superlattices by Seebeck effect measurements. Such a technique allows a precise determination of the amount of charge transferred on each CuO2 plane. A systematic characterization of thermoelectric power in (BaCuO2+delta)(2)/(CaCuO2)(n) and (Ba0.9Nd0.1CuO2+delta)(2)/(CaCuO2)(n) superlattices demonstrates that electrical charge distributes uniformly among the CuO2 planes in the Ca block. The differences observed in the Seebeck effect behavior between the Nd-doped and undoped superlattices are ascribed to the different metallic character of the Ba block in the two cases. Finally, the special role of structural disorder in superlattices with n=1 is pointed out by such analysis.

Putti, M., Marre, D., Pallecchi, I., Medaglia, P.g., Tebano, A., Balestrino, G. (2004). Analysis of the charge transfer mechanism on (Ba1-xNdxCuO2+delta)(2)/(CaCuO2)(n) superconducting superlattices by thermoelectric power measurements, 69(13) [10.1103/PhysRevB.69.134511].

Analysis of the charge transfer mechanism on (Ba1-xNdxCuO2+delta)(2)/(CaCuO2)(n) superconducting superlattices by thermoelectric power measurements

MEDAGLIA, PIER GIANNI;TEBANO, ANTONELLO;BALESTRINO, GIUSEPPE
2004-01-01

Abstract

We have investigated the charge transfer mechanism in artificial superlattices by Seebeck effect measurements. Such a technique allows a precise determination of the amount of charge transferred on each CuO2 plane. A systematic characterization of thermoelectric power in (BaCuO2+delta)(2)/(CaCuO2)(n) and (Ba0.9Nd0.1CuO2+delta)(2)/(CaCuO2)(n) superlattices demonstrates that electrical charge distributes uniformly among the CuO2 planes in the Ca block. The differences observed in the Seebeck effect behavior between the Nd-doped and undoped superlattices are ascribed to the different metallic character of the Ba block in the two cases. Finally, the special role of structural disorder in superlattices with n=1 is pointed out by such analysis.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/03 - Fisica della Materia
English
barium derivative; calcium derivative; copper complex; metal; neodymium; oxygen derivative; article; crystallography; electric conductivity; electric potential; electricity; mathematical analysis; measurement; periodicity; superconductor; temperature dependence
Putti, M., Marre, D., Pallecchi, I., Medaglia, P.g., Tebano, A., Balestrino, G. (2004). Analysis of the charge transfer mechanism on (Ba1-xNdxCuO2+delta)(2)/(CaCuO2)(n) superconducting superlattices by thermoelectric power measurements, 69(13) [10.1103/PhysRevB.69.134511].
Putti, M; Marre, D; Pallecchi, I; Medaglia, Pg; Tebano, A; Balestrino, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/33463
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