Gap Symmetry of Superconductivity in UPd2Al3

Details Gap Symmetry of Superconductivity in UPd2Al3 Gap Symmetry of Superconductivity in UPd2Al3

2004-07-11

arxiv.org/abs/cond-mat/0407271v2

Physics

Condensed Matter

Superconductivity

8 pages, 4 figures, improved figures in replacement

Scientific paper

10.1103/PhysRevB.70.140509

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 $\Delta({\bf k})$ in UPd$_2$Al$_3$ has horizontal nodes and is given by $\Delta({\bf k}) =\Delta\cos(2\chi)$, with $\chi = ck_{z}$.

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