Sung Ho Kim, Oun-Ho Park, et al.
Small
A series of new YBa2Cu3Oy-like materials are reported in which the oxygen content and the average [Cu-O] charge (or Cu valence) are separately varied over a wide range. We find a distinct boundary between samples showing anomalous insulating behavior and those with high Tc. These data are interpreted to demonstrate that the [Cu-O] charge in the sheets largely determines Tc and that the variable oxygen content and the chains merely provide an insulating reservoir of charge. © 1988 The American Physical Society.
Sung Ho Kim, Oun-Ho Park, et al.
Small
M.A. Lutz, R.M. Feenstra, et al.
Surface Science
Ellen J. Yoffa, David Adler
Physical Review B
Frank Stem
C R C Critical Reviews in Solid State Sciences