One-dimensional oxygen ordering in YBa2Cu3O7- delta.

  title={One-dimensional oxygen ordering in YBa2Cu3O7- delta.},
  journal={Physical review. B, Condensed matter},
  volume={47 22},
  • Aligia
  • Published 4 May 1993
  • Physics
  • Physical review. B, Condensed matter
A model consisting of oxygen-occupied and -vacant chains is considered, with repulsive first- and second-nearest-neighbor interactions V 1 and V 2 , respectively. The statistical mechanics and the diffraction spectrum of the model are solved exactly and analytically with the only assumption V 1 >>V 2 . At temperatures T∼V i only a broad maximum at (1/2,0,0) is present, while for |δ-1/2|>1/14 at low enough T c the peak splits into two. The simple expression for the diffraction intensity obtained… 
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