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Phase Transitions and Self-Organization in Electronic and Molecular Networks pp 403–412Cite as

High-Temperature Superconductivity is Charge-Reservoir Superconductivity

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Part of the book series: Fundamental Materials Research ((FMRE))

Summary

By placing the charge-carrying holes in the charge-reservoirs, rather than in the cuprate-planes, we predicted that PrBa2Cu3O7 would superconduct — and it does. We also predicted the superconductivity of three more compounds that have since been found to have at least granular superconductivity: Gd1.6Ce0.4Sr2Cu2TiO10 [36,37], Pr1.5Ce0.5Sr2Cu2NbO10 [21,38], and Eu1.5Ce0.5Sr2Cu2TiO10 [36,39]. The chemical trends for PrBa2Cu3O7, Pb2Sr2Pr0.5Ca0.5Cu3O8, and Pr1.5Ce0.5Sr2Cu2NbO10) suggest that the cuprate-planes are not the main generators of superconductivity — while the fact that Sr2YRuO6 doped with Cu superconducts (and essentially at the same temperature as GdSr2Cu2RuO8 and Gd1.5Ce0.5Sr2Cu2RuO10) lends credence to the idea that the superconducting holes reside in the SrO layers of all three of these compounds, which is certainly true for Sr2YRuO6. The evidence is that there are no superconductors that can be made both n-type and p-type, because n-type high-temperature superconductors (at least of this class of materials) do not exist. Although Gd2-zCezSr2Cu2NbO10 is a natural superlattice of Gd2-zCezCuO4 and layers of /SrO/NbO2/SrO/CuO2/, the fact that Gd2-zCezCuO4 does not superconduct, while its superlattice does, indicates that the superconductivity originates in the charge reser-voirs, not in the cuprate-planes. Ba2GdRuO6 doped with Cu does not superconduct because of the Gd, which is an L=0 magnetic pair-breaker. Finally, Cu-doped Sr2YRuO6 is a superconductor with an onset temperature of Tc≈45 K and with the main superconductivity being in its SrO layers. Logical extension of this idea to (rare-earth)Sr2Cu2RuO8 and (rare-earth)1.5Ce0.5Sr2Cu2RuO10 (which both superconduct at ≈ 45 K), strongly suggests that the superconducting holes are also carried by the SrO layers of these materials as well.

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Author information

Authors and Affiliations

  1. Department of Physics, Arizona State University, Tempe, Arizona, 85287-1504, USA

    John D. Dow & Dale R. Harshman

  2. Department of Physics, University of Notre Dame, Notre Dame, Indiana, 46556, USA

    Howard A. Blackstead

  3. Physikon Research Corporation, P.O. Box 1014, Lynden, Washington, 98264, USA

    Dale R. Harshman

Authors
  1. John D. Dow
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  2. Howard A. Blackstead
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  3. Dale R. Harshman
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Editors and Affiliations

  1. Michigan State University, East Lansing, Michigan

    M. F. Thorpe

  2. Lucent Technologies, Bell Labs Innovations, Murray Hill, New Jersey

    J. C. Phillips

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© 2002 Kluwer Academic Publishers

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Dow, J.D., Blackstead, H.A., Harshman, D.R. (2002). High-Temperature Superconductivity is Charge-Reservoir Superconductivity. In: Thorpe, M.F., Phillips, J.C. (eds) Phase Transitions and Self-Organization in Electronic and Molecular Networks. Fundamental Materials Research. Springer, Boston, MA. https://doi.org/10.1007/0-306-47113-2_26

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  • DOI: https://doi.org/10.1007/0-306-47113-2_26

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-0-306-46568-0

  • Online ISBN: 978-0-306-47113-1

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