Superconducting gap structure of the 115's revisited

Abstract

Density functional theory calculations of the electronic structure of Ce- and Pu-based heavy fermion superconductors in the so-called 115 family are performed. The gap equation is used to consider which superconducting order parameters are most favorable assuming a pairing interaction that is peaked at (π,π,q_z) - the wavevector for the antiferromagnetic ordering found in close proximity. In addition to the commonly accepted $d_{x^2-y^2}$ order parameter, there is evidence that an extended s-wave order parameter with nodes is also plausible. We discuss whether these results are consistent with current observations and possible measurements that could help distinguish between these scenarios.

8 pages, 4 figures; Accepted for publication in JPCM

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Cited by in corpus (6)

• Electronic and dynamical properties of CeRh${}_2$As${}_2$: Role of Rh${}_2$As${}_2$ layers and expected hidden orbital order
• Unified character of correlation effects in unconventional Pu-based superconductors and δ-Pu
• Evolution of the superconducting energy gap structure concomitant with Fermi surface reconstruction in the heavy-fermion superconductor CeCoIn5
• The ab initio study of unconventional superconductivity in CeCoIn${}_5$ and FeSe
• Field-angle-resolved anisotropy in superconducting CeCoIn5 using realistic Fermi surfaces
• Sub-Phases in the Superconducting State of CeIrIn${}_5$ Revealed by Low Temperature $c$-axis Heat Transport