Abstract
The electron deficiency (hole concentration) in the system is determined by a chemical method. Our results show a direct correlation between and hole concentration. The hole concentration equals the Sr concentration to about . For , the hole concentration decreases and oxygen vacancies are formed. These results strongly support an all-electronic mechanism for superconductivity in this system.
- Received 8 June 1987
DOI:https://doi.org/10.1103/PhysRevB.36.4047
©1987 American Physical Society