Phase diagram of UPt$_3$ in the $E_{1g}$ model

Details Phase diagram of UPt$_3$ in the $E_{1g}$ model Phase diagram of UPt$_3$ in the $E_{1g}$ model

1994-12-07

arxiv.org/abs/cond-mat/9412039v1

Physics

Condensed Matter

11 pages, Revtex, 2 figures (uuencoded, gzip'ed Postscript)

Scientific paper

10.1103/PhysRevLett.74.4734

The phase diagram of the unconventional superconductor UPt$_3$ is explained under the long-standing hypothesis that the pair wavefunction belongs to the $E_{1g}$ representation of the point group. The main objection to this theory has been that it disagrees with the experimental phase diagram when a field is applied along the c-axis. By a careful analysis of the free energy this objection is shown to be incorrect. This singlet theory also explains the unusual anisotropy in the upper critical field curves, often thought to indicate a triplet pair function.

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