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Gap Symmetry of Superconductivity in UPd2Al3

H. Won·D. Parker·K. Maki·T. Watanabe·K. Izawa Y. Matsuda
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Abstract

The angle dependent thermal conductivity of the heavy-fermion superconductor UPd$_2$Al$_3$ in the vortex state was recently measured by Watanabe et al. Here we analyze this data from two perspectives: universal heat conduction and the angle-dependence. We conclude that the superconducting gap function $Δ({\bf k})$ in UPd$_2$Al$_3$ has horizontal nodes and is given by $Δ({\bf k}) =Δ\cos(2χ)$, with $χ= ck_{z}$.

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H. Won, D. Parker, K. Maki, T. Watanabe, K. Izawa Y. Matsuda. 2004-08-12. Gap Symmetry of Superconductivity in UPd2Al3. https://doi.org/10.1103/physrevb.70.140509

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