Possible Triplet Superconducting Order in Magnetic Superconducting Phase induced by Paramagnetic Pair-Breaking

Abstract

Motivated by recent thermal conductivity measurements in the superconductor CeCoIn5, we theoretically examine a possible staggered spin-triplet superconducting order to be induced by the coupled spin-density-wave (SDW) and d-wave superconducting (SC) orders in the high field and low temperature (HFLT) SC phase peculiar to this material with strong paramagnetic pair-breaking (PPB). It is shown that one type of the $\pi$-triplet order is consistent with the thermal conductivity data and can naturally be incorporated in the picture that the Q-phase is a consequence of the strong PPB effect inducing the SDW order and the FFLO spatial modulation parallel to the applied magnetic field.

22 pages, 11 figures. Figs.1, 8. 1nd 9 were added together with comments on NMR data

References in corpus (6)

• Switching of magnetic domains reveals evidence for spatially inhomogeneous superconductivity
• FFLO Superconductivity near the Antiferromagnetic Quantum Critical Point
• Anisotropic effect of Cd and Hg doping on Pauli limited superconductor CeCoIn${}_5$
• Inherent spin density wave instability by vortices in superconductors with strong Pauli effects
• High field superconducting phase diagrams including Fulde-Ferrell-Larkin-Ovchinnikov vortex states
• Antiferromagnetic Order oriented by Fulde-Ferrell-Larkin-Ovchinnikov Superconducting Order

Cited by in corpus (1)

• Distinct domain switching in Nd0.05Ce0.95CoIn5 at low and high fields