Abstract
The in-plane resistivity () of has been studied over a wide temperature (4–1000 K) and composition range (0<x<0.35). The much discussed T-linear resistivity is observed only in the narrow composition region associated with optimal superconductivity. In the underdoped range (x<0.1), we observe first indications of resistivity saturation and analyze the resistivity as indicative of a ‘‘small’’ Fermi surface. In the overdoped range (x>0.2), follows a novel power-law dependence, ρ∞, over the entire temperature range up to 1000 K.
- Received 8 May 1992
DOI:https://doi.org/10.1103/PhysRevLett.69.2975
©1992 American Physical Society