Magnetic effects on the phase transitions in unconventional superconductors

TL;DR

This paper investigates how magnetic effects influence phase transitions in unconventional superconductors and superfluids, revealing new critical behaviors and fluctuation-driven first order transitions applicable to various ferromagnetic systems.

Contribution

It introduces a new critical behavior framework for unconventional superconductors using the Wilson-Fisher renormalization-group method, predicting novel fluctuation-driven first order phase transitions.

Findings

Identification of a new critical behavior in unconventional superconductors

Prediction of fluctuation-driven first order phase transitions

Application to ferromagnetic superconductors like UGe2 and URhGe

Abstract

A new critical behavior in unconventional superconductors and superfluids is established and described by the Wilson-Fisher renormalization-group method. For certain symmetries of order a new type of fluctuation-driven first order phase transitions at finite and zero temperature are predicted. The results can be applied to a wide class of ferromagnetic superconductive and superfluid systems, in particular, to itinerant ferromagnets as UGe_2 and URhGe.