Charge transfer associated with iodine intercalation in Bi2Sr2Can−1CunOy, n=1−3

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Abstract

Intercalation of iodine into the Bi2Sr2Can-1CunOy (n=1,2,3) superconductors has been studied. A variety of measurements indicate charge transfer is associated with the intercalation process, both directly to the BiO layers and also to the superconducting CuO2 sheets. Changes in Tc on intercalation can be understood in terms of hole doping to the CuO2 planes. Hall coefficient measurements on a single crystal n=2 sample supported an increase in hole concentration, and an XPS study clearly showed the ionic character for the intercalated iodine, accompanied by changes in the Fermi level. Investigation of the c-axis resistivity, also on n=2 single crystals, indicated a change from the semiconductive behaviour of the parent crystal to an apparently metallic character, though the c-axis resistivity remained high.

References (20)

  • H. Nakashima et al.

    Physica C

    (1991)
  • Y. Koike et al.

    Solid State Commun.

    (1991)
  • M.R. Presland et al.

    Physica C

    (1991)
  • R.B. Goldfarb et al.

    Cryogenics

    (1987)
  • X.-D. Xiang et al.

    Nature

    (1990)
  • X.-D. Xiang et al.

    Phys. Rev. B

    (1991)
  • X.-D. Xiang et al.

    Science

    (1991)
  • X.-D. Xiang et al.

    Phys. Rev. Lett.

    (1992)
  • T. Hasegawa et al.

    Jpn. J. Appl. Phys.

    (1990)
  • N. Motohira et al.

    J. Ceram. Soc. Jpn.

    (1989)
There are more references available in the full text version of this article.

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    Citation Excerpt :

    In the present approach this implies that for given yttrium content x, the kF (and thus κ) values of pristine and intercalated materials are the same. Taking a maximum pristine TC of 90 K, and using (pristine) κm, we calculate that g(β′) for the intercalated system amounts to 4.821 if TC decreases to 81 K [7], whereas for 79 K [8,9] it is 4.691. With the help of these two values (both independent of x), we can carry through the calculation of TC(int) as a function of κ3.

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