Exciton Mediated Triplet Superconductivity in Th System PrOs4Sb12
Abstract
In PrOs4Sb12, the lowest-lying singlet and triplet states in a Pr 4f2 configuration hybridize with conduction electrons having local au and tu point-group symmetries. It is shown that for an attractive triplet pairing interaction, the orbital degrees of freedom of the tu component are important. In addition, the Th point-group symmetry characteristic of skutterudites plays an important role in stabilizing triplet superconductivity.
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