Fractional-flux vortices and spin superfluidity in triplet superconductors

TL;DR

This paper explores fractional flux vortices and spin superfluidity in triplet superconductors, revealing new vortex states and a novel spin superfluid phase without superconductivity under specific conditions.

Contribution

It introduces the concept of fractional flux vortices and predicts a spin superfluid state in triplet superconductors, expanding understanding of topological excitations and phases.

Findings

Fractional flux vortices can exist alongside integer flux vortices.

A spin superfluid state can occur without superconductivity.

Conditions for the emergence of these states are identified.

Abstract

We discuss a novel type of fractional flux vortices along with integer flux vortices in Kosterlitz-Thouless transitions in a triplet superconductor. We show that under certain conditions a spin-triplet superconductor should exhibit a novel state of {\it spin superfluidity} without superconductivity.