Hunds Rule Theory for Heavy Fermion Superconductors

Details Hunds Rule Theory for Heavy Fermion Superconductors Hunds Rule Theory for Heavy Fermion Superconductors

1993-05-12

arxiv.org/abs/cond-mat/9305008v2

Phys Rev Lett 72, 2077 (1994)

Physics

Condensed Matter

revised manuscript, 15 pages (Plain TeX with macros), plus 1 postscript figure

Scientific paper

10.1103/PhysRevLett.72.2077

In this paper, a generalization of standard spin fluctuation theory is considered which takes into account orbital degeneracy effects which are critical for describing f electrons. This theory leads to an instability for a superconducting pair state which obeys Hunds rules. Such a state has L=5, S=1, and J=4. The degeneracy of this state is broken by crystalline effects, and realistic calculations for $UPt_3$ find a resultant pair state with $\Gamma_6^-$ symmetry, consistent with current experimental constraints.

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