C.M. Brown, L. Cristofolini, et al.
Chemistry of Materials
One of the fundamental questions involving the high-temperature copper oxide containing superconductors is to understand the relationship between hole concentration and the superconducting transition temperature, Tc. We help resolve this question by a study of Nd-, La-, Ga-, Ca-, and Zn-substituted YBa2Cu3Oy with controlled oxygen stoichiometry. The total hole concentration is determined by a chemical method and trends in the mobile hole concentration by Hall measurements. By considering Tc to be a function of the mobile sheet holes only, there is a maximum in Tc (92 K) at a sheet-hole concentration of about 0.20-0.25 per Cu site. © 1989 The American Physical Society.
C.M. Brown, L. Cristofolini, et al.
Chemistry of Materials
T.N. Morgan
Semiconductor Science and Technology
John G. Long, Peter C. Searson, et al.
JES
Xikun Hu, Wenlin Liu, et al.
IEEE J-STARS