Relation between superconducting transition temperature and oxygen ordering in YBa2Cu3O6+x

Research output: Contribution to journalJournal articleResearchpeer-review

  • Henning Friis Poulsen
  • Niels Hessel Andersen
  • Jørgen Vrtting Andersen
  • Henrik Bohrt
  • Mouritsen, Ole G.

THE superconducting transition temperature, Tc, of the ceramic high-temperature superconductor YBa2Cu3O6+xis known to depend not only on the oxygen stoichiometry x (0 < x < 1) but also on the specific ordering of the oxygen atoms in the basal CuO planes1-7. Here we present computer simulations of the formation of oxygen-ordered domains of orthorhombic structure in the basal CuO plane using a microscopic model of the oxygen ordering. Together with a minimal-model assumption for the charge transfer, our calculations strongly suggest that it is these domains that are responsible for the characteristic variation of Tc(x). Our results lead to a theoretical prediction of Tc(x) that is in close quantitative agreement with experiments.

Original languageEnglish
JournalNature
Volume349
Issue number6310
Pages (from-to)594-596
Number of pages3
ISSN0028-0836
DOIs
Publication statusPublished - 1 Jan 1991

ID: 236892765