Superconductivity in Pb-based 1212 cuprates; evidence for under-doping from thermoelectric power

R. S. Liu, S. D. Obertelli, S. F. Hu, P. P. Edwards, D. A. Jefferson

研究成果: 雜誌貢獻文章同行評審

1 引文 斯高帕斯(Scopus)

摘要

We have synthesized three superconducting compounds based on the Pb-1212 phase, namely (Pb0.75Cu0.25)Sr2(Ca0.5Y0.5) Cu2O7-δ, (In0.2Pb0.55Cu0.25)Sr2(Ca0.5Y0.5)Cu2O7-δ and (Pb0.75Cu0.25)Sr2(Ca0.5Yb0.5)Cu2O7-δ, having Tc's of 40 K, 55 K and 60 K, respectively. From thermoelectric power measurements we conclude that these Pb-1212 based materials are located in the "underdoped" region compared to YBa2Cu3O7-δ. Our proposal is that still higher Tc's may be possible if one can successfully introduce even greater concentrations of holes into the conducting CuO2 plane.

原文英語
頁(從 - 到)31-34
頁數4
期刊Solid State Communications
87
發行號1
DOIs
出版狀態已發佈 - 1993 七月

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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