Share Email Print
cover

Proceedings Paper

Superconducting ReBa2Cu3O7-δ ultrathin films and superlattices
Author(s): Qi Li; Chuhe Kwon; Santanu Bhattacharya; Chris Doughty; S.-N. Mao; L. Senapathi; Xiaoxing Xi; T. Venkatesan; J. L. Peng; Z. Li; Richard L. Greene; Kyunmgin Ham; R. Sooryakumar; Steven A. Schwarz
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Ultrathin ReBa2Cu3O7-(delta ) (ReBCO) (Re equals Y, Nd) films in the form of trilayer sandwiches between (PrxY1-x)Ba2Cu3O7- (delta )((PrxY1-x)BCO) (1 >= x >= 0) and YBCO/(PrxY1-x)BCO superlattices with nominal YBCO layer thickness as thin as 1 unit- cell were grown by pulsed laser deposition. It was found that although the 1-unit-cell thick YBCO films were superconducting, the Tc value depends strongly on the doping level x in the adjacent layers. The Tc value increases when x is reduced. A number of effects, either extrinsic or intrinsic in origin, have been examined by various experiments. The results indicate that the lattice mismatch, interdiffusion between Y and Pr atoms, and oxygen deficiency are unlikely to be the primary reason. Charge redistribution and the possibility of K-T transition were suggested by Raman and transport measurement, but the effects observed may not be sufficient to explain the change of zero resistance temperature and the broadening of the transition in these sample structures.

Paper Details

Date Published: 29 June 1994
PDF: 12 pages
Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); doi: 10.1117/12.179156
Show Author Affiliations
Qi Li, Univ. of Maryland/College Park (United States)
Chuhe Kwon, Univ. of Maryland/College Park (United States)
Santanu Bhattacharya, Univ. of Maryland/College Park (United States)
Chris Doughty, Univ. of Maryland/College Park (United States)
S.-N. Mao, Univ. of Maryland/College Park (United States)
L. Senapathi, Univ. of Maryland/College Park (United States)
Xiaoxing Xi, Univ. of Maryland/College Park (United States)
T. Venkatesan, Univ. of Maryland/College Park (United States)
J. L. Peng, Univ. of Maryland/College Park (United States)
Z. Li, Univ. of Maryland/College Park (United States)
Richard L. Greene, Univ. of Maryland/College Park (United States)
Kyunmgin Ham, The Ohio State Univ. (United States)
R. Sooryakumar, The Ohio State Univ. (United States)
Steven A. Schwarz, Bell Communications Research (United States)


Published in SPIE Proceedings Vol. 2157:
Superconducting Superlattices and Multilayers
Ivan Bozovic, Editor(s)

© SPIE. Terms of Use
Back to Top