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Superconducting Properties of the Family of Mercurocuprates and Role of Layered Structure

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Abstract

The various phases of the homologous series HgBa2Ca n−1Cu n O2n+2+δ were synthesized earlier using the program-controlled high pressure chamber. We observed that dependence of T c(a), where a is the in-plane lattice constant (and consequently oxygen content δ) have a typical bell-shaped character. T c versus lattice constant has a similar bell-shaped curve for several values of n, with the maximum T c value measured for n=3. We have analysed this dependence (and of the formal copper valence) for different members of mercurocuprate family in terms of the phenomenological model of layered superconductors taking into account possible charge redistribution. The experimentally observed nonmonotonic bell-shaped dependence T c(n) was consistent with our model.

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Authors and Affiliations

  1. High Pressure Physics Institute, 142092, Troitsk, Moscow Region, Russia

    I. G. Kuzemskaya

  2. Joint Institute for Nuclear Research, 141980, Dubna, Moscow Region, Russia

    A. L. Kuzemsky & A. A. Cheglokov

Authors
  1. I. G. Kuzemskaya
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  2. A. L. Kuzemsky
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  3. A. A. Cheglokov
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Kuzemskaya, I.G., Kuzemsky, A.L. & Cheglokov, A.A. Superconducting Properties of the Family of Mercurocuprates and Role of Layered Structure. Journal of Low Temperature Physics 118, 147–152 (2000). https://doi.org/10.1023/A:1004638822300

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  • DOI: https://doi.org/10.1023/A:1004638822300

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