A. Amato, R.A. Fisher, et al.
Physica B: Condensed Matter
Samples of La2-xSrxCuO4- have previously shown a maximum concentration of p=0.15 holes per [CuO2] unit, because increasing x>0.15 normally induces compensating oxygen vacancies. Annealing samples in 100 bars of oxygen pressure fills the oxygen vacancies and greatly increases the range of accessible hole concentrations, up to p=0.40 (or effectively Cu+2.40). We find that Tc is constant at 36 K from p=0.15 to 0.24, where it begins to decrease. Beyond p0.32, superconductivity disappears, even though the samples are more conducting. © 1988 The American Physical Society.
A. Amato, R.A. Fisher, et al.
Physica B: Condensed Matter
M.W. Shafer, J.B. Torrance, et al.
Journal of Physics and Chemistry of Solids
S. Kagoshima, J.P. Pouget, et al.
Solid State Communications
Y. Tomkiewicz, A.R. Taranko, et al.
Physical Review B