Perspectives on Nodal Superconductors

Details Perspectives on Nodal Superconductors Perspectives on Nodal Superconductors

2004-07-11

arxiv.org/abs/cond-mat/0407269v2

Physics

Condensed Matter

Superconductivity

12 pages, 7 improved figures

Scientific paper

In the last few years the gap symmetries of many new superconductors,including Sr$_2$RuO$_4$, CeCoIn$_5$, $\kappa$-(ET)$_{2}$Cu(NCS)$_{2}$, YNi$_{2}$B$_{2}$C and PrOs$_{4}$Sb$_{12}$, have been identified via angle-dependent magnetothermal conductivity measurements. However, a controversy still persists as to the nature of the superconductivity in Sr$_2$RuO$_4$. For PrOs$_{4}$Sb$_{12}$, spin-triplet superconductivity has recently been proposed. Here, we also propose g-wave superconductivity for UPd$_2$Al$_3$ (i.e., $\Delta({\bf k})=\Delta\cos(2\chi), \chi = ck_{z}$) based on recent thermal conductivity data.

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