Atomic structure and superconductivity of YBa2Cu3O7-x
Simonov V. I. , Molchanov V. N. , Vainshtein B. K.
The atomic mechanism for the transition from the tetragonal phase to the orthorhombic phase has been identified on the basis of x-ray structural studies of YBa2Cu307 _ x single crystals before and after annealing in oxygen. The elements of the atomic structure associated with superconductivity are identified.