High quality single crystals of UPt_3 have been prepared by vertical float-zone refining in ultra-high vacuum. We find that the superconducting transition temperature can be varied systematically by annealing, revealing that the transition temperature intrinsic to UPt_3 is 563 +/- 5 mK. 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.
@article{arxiv.cond-mat/9806266,
title = {Suppression of Superconductivity in UPt_3 Single Crystals},
author = {J. B. Kycia and J. I. Hong and M. J. Graf and J. A. Sauls and D. N. Seidman and W. P. Halperin},
journal= {arXiv preprint arXiv:cond-mat/9806266},
year = {2010}
}
Comments
4 pages, 4 figures in postscript. To appear in Phys. Rev. B 58 (July 1, 1998)