Abstract
The electron hole concentration in the planes of (YBCO) has been evaluated using the unit cell length in the direction together with a simple estimation for in the chain oxygen-ordered phases. The empirical relationship between and obtained allows the calculation of from the -axis lattice parameter for the entire doping range of YBCO. It is also suggested that the empirical parabola describing the relationship between and in is reasonably correct for YBCO except for the region around , where the of YBCO is suppressed by as much as . A plot of vs and a correction of the parabola for the effect are presented, allowing convenient determination of from and .
- Received 24 October 2005
DOI:https://doi.org/10.1103/PhysRevB.73.180505
©2006 American Physical Society