High-pressure study on high-Tc (ZnPc) Bi-2223 oxides

J. G. Lin, C. Y. Huang, Y. Y. Xue, C. W. Chu, L. Grigoryan, K. Yakushi

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5 引文 斯高帕斯(Scopus)


We have measured the pressure effect on the superconducting transition temperature Tc and the normal-state resistivity R for the high-Tc Bi-2223 oxides intercalated with zinc-phthalocyanine (ZnPc). At ambient pressure, Tc is degraded from 110 K to 90 K with the intercalation of 0.01 ZnPc per unit cell, and T changes its temperature dependence from metallic to semiconducting-like behavior, suggesting that the intercalation affects the electronic structure of the CuO2 plane significantly. We have obtained dTc/dP=1.9±0.3, 1.7±0.4 and 1.8±0.3 K/GPa for samples with Tc=110, 100 and 90 K, respectively. On the other hand, the normalized pressure effect on the normal-state resistivity dln R/dP is rather different for these three samples, changing from 2%/GPa to -20%/GPa. We have tentatively ascribed the nearly constant value of dTc/dP (≈2 K/GPa) to the pressure effect on the hopping integrals of the conducting holes, and the large variation in dln R/dP to the enhanced compressibility along the c-axis.

頁(從 - 到)177-181
期刊Physica C: Superconductivity and its applications
出版狀態Published - 1994 9月 20

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 能源工程與電力技術
  • 電氣與電子工程


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