Pressure-temperature phase diagram of ferromagnetic superconductors

TL;DR

This paper develops a symmetry-based model for the pressure-temperature phase diagram of ferromagnetic superconductors with triplet pairing, considering orthorhombic crystals and strong spin-orbit coupling, highlighting a first-order transition.

Contribution

It introduces a symmetry approach to describe the phase diagram of ferromagnetic superconductors, incorporating recent experimental data on UCoGe and the effects of crystal structure and spin-orbit coupling.

Findings

First-order transition accompanies the formation of ferromagnetic superconducting state.

The model accounts for orthorhombic crystal structure and strong spin-orbit coupling.

Provides a theoretical framework consistent with experimental observations.

Abstract

The symmetry approach to the description of the (P,T) phase diagram of ferromagnet superconductors with triplet pairing is developed. Taking into account the recent experimental observations made on UCoGe it is considered the case of a crystal with orthorhombic structure and strong spin-orbital coupling. It is shown that formation of ferromagnet superconducting state from a superconducting state is inevitably accompanied by the first order type transition.