Specific Heat Characterization of UPt$_3$ with Varied Anisotropic Quasiparticle Scattering
ORAL
Abstract
UPt$_3$ is an unconventional superconductor with multiple superconducting phases. It is believed to be a chiral triplet f-wave superconductor. Previous work, through UHV float zone refining and annealing at a range of temperatures, created a set of high quality UPt$_3$ crystals. Through electrical transport measurements, the upper transition temperature was found to be related to the level of structural defects and that the scattering was anisotropic.\footnote{J.B. Kycia, J.I. Hong, M.J. Graf, J.A. Sauls, D.N. Seidman, W.P. Halperin, Phy. Rev. B \textbf{58}, R603 (1998).} In this work, we will present specific heat characterization of a set of these samples (with RRR of 420, 720, and 1460). Through this we can identify the sensitivity of the A and B superconducting phases to anisotropic scattering.
*JBK, DP, and CM acknowledge support from NSERC and WPH acknowledges support from the DOE BES Division of Materials Sciences and Engineering, DE-FG02-05ER46248.
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