Journal of Low Temperature Physics

, Volume 105, Issue 3–4, pp 705–710 | Cite as

Theory of sm1.5Ce0.5sr2Cu2Nbo10: Critical-temperature and doping effects

  • Howard A. Blackstead
  • John D. Dow
  • D. B. Pulling
Theory

Abstract

For Sm1.5Ce0.5Sr2Cu2NbO10, the charge-reservoir oxygen model of superconductivity predicts: (i) Tc≈30 K (vs. the observed ≈28K); (ii) Roughly 1 percent Ni on Cu sites should drive Tc to zero; (iii) The superconductivity originates in the SrO layers; and (iv) The conduction, as with all high-temperature oxide superconductors, is necessarily p-type. The model also explains why this material can superconduct in the presence of the magnetic rare-earth ion Sm and why Gd on Sm sites does not destroy superconductivity, despite structural similarities to Sm2-zCezCuO4 and Gd2-zCezCuO4, although the former superconducts and the latter does not.

PACS numbers

74.20.Fg 74.70.Vy 

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Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • Howard A. Blackstead
    • 1
  • John D. Dow
    • 1
    • 2
  • D. B. Pulling
    • 1
  1. 1.Department of PhysicsUniversity of Notre DameNotre DameUSA
  2. 2.Department of PhysicsArizona State UniversityTempeUSA

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