Theory of type-II superconductivity in ferromagnetic metals with triplet pairing

TL;DR

This paper develops a theoretical framework for understanding type-II superconductivity with triplet pairing in ferromagnetic metals, specifically applied to uranium compounds, highlighting their nonconventional superconducting behavior.

Contribution

It introduces a theory of type-II superconductivity in two-band ferromagnetic metals with equal spin triplet pairing, tailored to uranium-based compounds.

Findings

Superconductivity in uranium compounds is nonconventional and occurs below the Curie temperature.

The theory describes the emergence of superconductivity with slight magnetization expulsion.

Application of Abrikosov's theory to ferromagnetic metals with triplet pairing is demonstrated.

Abstract

The superconducting state in uranium compounds UGe2, URhGe and UCoGe is formed at temperatures far below the Curie temperature pointing on nonconventional nature of superconductivity in these materials - namely the superconductivity with triplet pairing. The emergence of superconductivity is accompanied by the slight magnetization expulsion typical for the type-II superconductors. Following classic Abrikosov paper I develop the theory of type-II superconductivity in application to two-band ferromagnetic metal with equal spin triplet pairing.