Oxygen intercalation in the perovskite superconductor YBa2Cu3O6+x

W. R. McKinnon, M. L. Post, L. S. Selwyn, G. Pleizier, J. M. Tarascon, P. Barboux, Laura Greene, G. W. Hull

Research output: Contribution to journalArticle


We have studied superconductivity and the thermodynamics of oxygen insertion in the oxygen intercalation system YBa2Cu3O6+x. The superconducting transition temperature decreases as x decreases, and the transition is sharp at Tc=90 K near x=1 and at 55 K near x=0.5. The thermodynamics of oxygen intercalation at high temperatures (both isotherms and isobars), and the orthorhombic-tetragonal transition, can be explained in terms of a lattice-gas model that includes a large energy of repulsion between oxygen atoms on nearest-neighbor sites. The high-temperature behavior is also consistent with smaller interactions, some attractive, between second neighbors. Such energies are needed to explain the behavior at low temperatures.

Original languageEnglish (US)
Pages (from-to)6543-6551
Number of pages9
JournalPhysical Review B
Issue number10
StatePublished - Jan 1 1988

ASJC Scopus subject areas

  • Condensed Matter Physics

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    McKinnon, W. R., Post, M. L., Selwyn, L. S., Pleizier, G., Tarascon, J. M., Barboux, P., Greene, L., & Hull, G. W. (1988). Oxygen intercalation in the perovskite superconductor YBa2Cu3O6+x. Physical Review B, 38(10), 6543-6551. https://doi.org/10.1103/PhysRevB.38.6543