Coexistence of p-wave Cooper pairing and ferromagnetism

TL;DR

This paper investigates a two-band model where p-wave superconductivity coexists with localized ferromagnetism, revealing mutual enhancement and factors influencing the Curie temperature.

Contribution

It introduces a two-band model demonstrating how ferromagnetism and p-wave superconductivity mutually enhance each other, differing from one-band models.

Findings

Ferromagnetic and superconducting states enhance each other.

Curie temperature can be increased by electron-spin coupling.

Curie temperature is unlikely to be below the superconducting transition temperature.

Abstract

A two-band model for coexistence of p-wave superconductivity with localized ferromagnetism is studied using the equation of motion approach. It shows that ferromagnetic and superconducting states enhance each other but in a different way from that of the one-band model. The Curie temperature is not only determined by the exchange interactions between localized spins, but also can be increased with the coupling between electrons and spins, and with the p-wave Cooper-pairing interaction. These results are complementary to those of the one-band model, which suggest that the Curie temperature is unlikely to ever be below the superconducting transition temperature.