Phys. Rev. B 69, 134511 (2004) [6 pages]Analysis of the charge transfer mechanism on (Ba1-xNdxCuO2+δ)2/(CaCuO2)n superconducting superlattices by thermoelectric power measurementsReceived 27 November 2003; published 19 April 2004 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+δ)2/(CaCuO2)n and (Ba0.9Nd0.1CuO2+δ)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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.69.134511
DOI:
10.1103/PhysRevB.69.134511
PACS:
74.78.Fk, 72.15.Jf, 74.72.-h
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.