Superconducting ReBa2Cu3O7-8,9 ultrathin films and superlattices

Qi Li, C. Kwon, Santanu Bhattacharya, C. Doughty, S. N. Mao, L. Senapathi, Xiao X. Xi, T. Venkatesan, J. L. Peng, Z. Li, Richard L. Greene, K. M. Ham, R. Sooryakumar, Steven A. Schwarz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


Ultrathin ReBa2Cu3O7-δ (ReBCO) (Re = Y, Nd) films in the form of trilayer sandwiches between (PrxY1-x)Ba2Cu3O 7-δ((PrxY1-x)BCO) (1 ≥ x ≥ 0) and YBCO/(Pr xY1-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.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsIvan Bozovic
PublisherPubl by Society of Photo-Optical Instrumentation Engineers
Number of pages12
ISBN (Print)0819414522
StatePublished - 1994
EventSuperconducting Superlattices and Multilayers - Los Angeles, CA, USA
Duration: Jan 24 1994Jan 25 1994

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherSuperconducting Superlattices and Multilayers
CityLos Angeles, CA, USA

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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