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

## TL;DR

This paper proposes that a triplet superconducting order can be induced by paramagnetic pair-breaking effects in the high field, low temperature phase of CeCoIn5, explaining recent thermal conductivity measurements.

## Contribution

It introduces a theoretical model where a staggered spin-triplet order arises from SDW and d-wave SC orders under strong paramagnetic pair-breaking in CeCoIn5.

## Key findings

- A type of $$-triplet order aligns with thermal conductivity data.
- The triplet order can be integrated into the SDW and FFLO framework.
- The model explains the high field, low temperature phase as a consequence of PPB effects.

## 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.