Superconducting gap nodes in PrOs_4Sb_12
S. H. Curnoe, T. R. Abu Alrub, I. A. Sergienko, I. Vekhter
TL;DR
This paper investigates the nature of superconducting gap nodes in PrOs4Sb12, revealing how phase transitions affect node structure and discussing implications for multiple superconducting phases.
Contribution
It introduces a model for how superconducting gap nodes evolve across phase transitions in PrOs4Sb12 with tetrahedral symmetry.
Findings
Nodes in the (0,0,1) phase are along [001] directions.
Phase transition causes nodes to lift and split into deep dips.
Implications for multiple superconducting phases in PrOs4Sb12.
Abstract
We examine the superconducting gap nodes in crystals with tetrahedral (T_h) symmetry. The (0,0,1) phase of the three dimensional order parameter in the triplet channel has nodes in the [001] directions. Following a second order phase transition to the state (0,i|eta_2|,|eta_1|), each node lifts away from the Fermi surface and splits into two deep dips. We discuss this scenario in the context of multiple superconducting phases in PrOs4Sb12.
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