Im. Fita et al., Evolution of the superconductivity during the pressure-induced oxygen ordering process in oxygen-deficient REBa2Cu3O6+x (RE=Y,Nd,La), J L TEMP PH, 117(3-4), 1999, pp. 909-913
The pressure controlled oxygen reordering processes in REBa2Cu3O6+x, (RE=Y,
Nd,La) causing the continous charge transfer between the CuOx and CuO2 plan
es were investigated. The charge transfer results in the time evolution of
superconductivity. A strong acceleration of ordering and disordering proces
ses was found when the RE-ion size increases from Y to La. Pressure induced
semiconductor-superconductor transition in LaBa2Cu3O6+x resulted from the
oxygen ordering is reported for the first time.