Two effects of iodine intercalation on Tc in Bi2Sr2Ca1-xYxCu2O8. Two-dimensionality and charge transfer

Akihiko Fujiwara, Yoji Koike, Keiichi Sasaki, Mitsunori Mochida, Takashi Noji, Yoshitami Saito

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Effects of the stage-1 iodine-intercalation on Tc have been investigated in Bi2Sr2Ca1-xYxCu2O8. The iodine intercalation produces two large effects; one is enhancement of the two-dimensionality due to expansion of the crystal along the c-axis, and the other is increase of conductive hole carriers due to charge transfer between intercalated iodine atoms and CuO2 sheets in the host material. For the stage-1 iodine-intercalation compounds, it has been found that the former effect decreases Tc by about 10 K and that the latter effect shifts the x dependence of Tc to larger x values by about 0.05 because of the increase of conductive hole carriers by about 0.025 per CuO2 unit. It has been concluded that the decrease in Tc through the I intercalation in Bi2Sr2CaCu2O8 is due to both effects.

Original languageEnglish
Pages (from-to)411-418
Number of pages8
JournalPhysica C: Superconductivity and its applications
Issue number3-4
Publication statusPublished - 1992 Dec 10

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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