Abstract
High-quality single crystals of have been prepared by vertical float-zone refining in ultrahigh vacuum. We find that the superconducting transition temperature can be varied systematically by annealing, revealing that the transition temperature intrinsic to is The suppression of the superconducting transition from defects is consistent with a modified Abrikosov-Gor’kov formula that includes anisotropic pairing, Fermi-surface anisotropy, and anisotropic scattering by defects.
- Received 24 March 1998
DOI:https://doi.org/10.1103/PhysRevB.58.R603
©1998 American Physical Society